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Agent Skill · 研究检索

htmx(htmx 搜索)

htmx 用于查找、检索和筛选相关信息,适合在 Codex、Claude、Cursor、Gemini CLI 中需要根据关键词、任务场景或来源线索快速定位候选结果时使用。可结合来源仓库、安装命令和原始 README 继续核验具体用法。安装前建议确认权限范围、维护状态,以及是否会触发联网、命令执行或文件读写。

htmx 是研究检索类 Agent Skill,可用宿主为 Codex、Claude、Cursor、Gemini CLI,通过GitHub 仓库获取,权限为操作浏览器;许可证信息还不明确,第三方扫描已通过,按安装量在研究检索类的 73,675 个 Skill 里排第 61,880。

总安装 346周安装 14GitHub Stars 14下载 109核验 2026-05-01

安装说明

本站只整理中文说明,不托管安装包,也不代用户安装。
GitHub
许可证
unknown

安装方式

通过对话安装

复制提示词发给支持本地命令或 Skills 的 AI 助手,先确认命令和权限,再让它执行。

请帮我安装这个 Agent Skill:htmx(htmx 搜索)
来源仓库:https://github.com/gopherguides/gopher-ai
仓库路径:skills/htmx
安装命令:
npx skills add https://github.com/gopherguides/gopher-ai --skill htmx
安装前请先检查当前环境是否支持对应 CLI,并向我确认将要执行的命令、安装目录、联网范围和文件读写权限;确认后再执行。

命令行安装

复制命令到本机终端执行。该命令会通过 npx skills 从第三方来源获取 Skill;本站只展示命令,不托管安装包,也不自动执行。

skills.shnpx skills
npx skills add https://github.com/gopherguides/gopher-ai --skill htmx

这个 Skill 是做什么的

研究检索类 Skill 主要解决「找资料、核对事实、把来源整理清楚」的问题,通常会让助手先检索再总结。

htmx 用于查找、检索和筛选与 htmx 相关的技术资源和文档。适合在 Codex、Claude、Cursor、Gemini CLI 中快速定位候选结果时使用。通过 npx skills add 命令从 GitHub 安装,需确认权限范围和维护状态。使用前应核实是否会触发联网、命令执行或文件读写操作。

建议结合原始 README 和仓库内容进一步核验具体用法。

来源仓库内路径:skills/htmx

上手步骤

4 步
  1. 1

    确认自己的宿主工具

    公开资料标注支持 Codex、Claude、Cursor、Gemini CLI;先确认自己用的是其中之一,再按对应工具的 Skills 目录放置。

  2. 2

    拿到安装命令

    可以直接复制的命令是 npx skills add https://github.com/gopherguides/gopher-ai --skill htmx;命令里的占位符换成自己的路径或密钥再执行。

  3. 3

    安装后重启宿主

    命令执行完要完全退出宿主工具再打开,让新装的 Skill 被重新扫描到,否则列表里可能看不到。

  4. 4

    按最小权限试用

    它需要操作浏览器,先在测试目录或测试账号里跑,确认没问题再放到正式项目。

常见问题

6 条

htmx 怎么安装?

在终端执行 npx skills add https://github.com/gopherguides/gopher-ai --skill htmx。装完完全退出宿主工具再打开,让它重新扫描本地 Skill。

htmx 支持哪些 AI 工具?

公开资料标注支持 Codex、Claude、Cursor、Gemini CLI。其他工具只要能读取本地 Skill 目录,一般也能手动放进去,但要自己确认触发方式是否一致。

htmx 需要什么权限?

权限级别是操作浏览器。该 Skill 可能涉及浏览器控制能力,使用时可能读取或操作网页内容,需要在受控环境中确认权限边界。

htmx 是免费的吗?

公开资料没有标注明确许可证,收费和商用限制都无法确认。正式使用前请到来源仓库核对授权说明。

htmx 用的人多吗?

公开数据是累计安装 346 次,近一周安装 14 次,下载 109 次,GitHub 14 星。这些数字来自第三方目录统计,只能当作热度参考,不代表质量或安全性。

htmx 安全吗?

第三方扫描结果为通过,但这只覆盖已知的静态检查项,不能替代自己读一遍源码和安装命令。

值得选的地方和要先想清楚的地方

值得选的地方

  • 同时适配 4 种工具,换客户端不用重新找替代品。
  • 第三方扫描已通过,常见的高风险行为没有命中。

先想清楚的地方

  • 许可证没有明确标注,能不能商用、能不能再分发都不确定。
  • 第三方目录整理,版本更新和行为细节以来源仓库为准。

适不适合你

更适合

  • 已经在用 Codex,想直接扩展它能力的人。
  • 需要处理研究检索类任务、又不想每次都手写提示词的人。

不太适合

  • 需要明确授权才能用到公司项目里的场景。
  • 需要厂商级技术支持和 SLA 的生产系统。

研究检索类 Skill 对比

6 个同类
Skill总安装GitHub 星权限许可证扫描
find-skills

寻找技能 · Codex、Claude

31,199,81316,486操作浏览器MIT有提醒
self-improving-agent

自我改进 Agent · OpenClaw

16,464,0023,396接触敏感数据MIT-0通过
soultrace

灵魂追踪 · Codex、Claude

7,588,94412需要联网未明确有提醒
self-improving

自我完善 · OpenClaw

6,829,2841,046需要联网MIT-0通过
microsoft-foundry

微软代工厂 · Codex、Claude

6,614,144764调用外部服务未明确有提醒
htmx

htmx 搜索 · 本页

34614操作浏览器未明确通过

按安装量取同分类前几名;数字来自第三方目录统计,只作热度参考,不代表质量结论。

SKILL.md 原文

htmx Best Practices & Go/Templ Integration

Apply correct htmx patterns when building hypermedia-driven web applications, especially with Go and templ.

Core Principles

  • Return HTML fragments, not JSON — htmx is designed for hypermedia; the server returns rendered HTML
  • Use HTML attributes, not JavaScript — prefer hx-* attributes over htmx.ajax() or fetch() calls
  • Server controls behavior — use response headers (HX-Retarget, HX-Reswap, HX-Redirect) for control flow
  • Check HX-Request header — return fragments for htmx requests, full pages for normal requests
  • Don't mix paradigms — avoid using fetch() alongside htmx in the same page; pick one approach

Templ Interpolation Rules (CRITICAL)

Templ does NOT support string interpolation inside quoted attribute values. This is the #1 source of bugs.

Dynamic Attributes

// CORRECT: Go expression in curly braces (no quotes around braces)
templ ItemLink(id string) {
    <div hx-get={ fmt.Sprintf("/items/%s", id) }>Load</div>
}

// CORRECT: String concatenation also works
templ ItemLink(id string) {
    <div hx-get={ "/items/" + id }>Load</div>
}

// CORRECT: Echo named routes for type-safe URLs
templ ItemLink(c echo.Context, id string) {
    <div hx-get={ c.Echo().Reverse("items-show", id) }>Load</div>
}

// WRONG: No interpolation inside quoted strings — emits literal "{ id }"
templ ItemLink(id string) {
    <div hx-get="/items/{ id }">Load</div>
}

Dynamic JSON in hx-vals — Use json.Marshal, Not fmt.Sprintf

fmt.Sprintf with %s into JSON is an injection risk if the value contains ", \, or newlines. Always use json.Marshal or %q for safety.

// CORRECT: json.Marshal helper (safest — handles all special characters)
func hxVals(data map[string]any) string {
    b, err := json.Marshal(data)
    if err != nil {
        return "{}"
    }
    return string(b)
}

templ ItemButton(item Item) {
    <button hx-post="/api/items" hx-vals={ hxVals(map[string]any{"id": item.ID}) }>
        Save
    </button>
}

// CORRECT: %q for CSRF tokens (Go-safe quoting, handles quotes/backslashes)
templ Layout(c echo.Context, content templ.Component) {
    <body hx-headers={ fmt.Sprintf(`{"X-CSRF-Token": %q}`, CSRFToken(c)) }>
        @content
    </body>
}

// CORRECT: Static JSON uses plain quoted attribute
templ StaticVals() {
    <button hx-post="/api" hx-vals='{"key": "value"}'>Submit</button>
}

// DANGEROUS: %s with unescaped strings — breaks if value contains quotes
// A message like: Missing "alt" attribute → produces broken JSON
templ BrokenVals(message string) {
    <button hx-vals={ fmt.Sprintf(`{"message": "%s"}`, message) }>Send</button>
}

// WRONG: Mixing constant and dynamic syntax — emits literal "{ token }"
templ BrokenVals(token string) {
    <button hx-vals='{"csrf": "{ token }"}'>Submit</button>
}

URL Construction

// CORRECT: fmt.Sprintf for server-constructed URLs with multiple params
templ ItemRow(item Item) {
    <tr hx-get={ fmt.Sprintf("/items/%d/edit", item.ID) } hx-trigger="click"
        hx-target="this" hx-swap="outerHTML">
        <td>{ item.Name }</td>
    </tr>
}

// CORRECT: String concatenation for simple paths
templ JobRow(jobID string) {
    <tr hx-get={ "/api/jobs/" + jobID + "/row" } hx-trigger="every 2s" hx-swap="outerHTML">
        // row content
    </tr>
}

// CORRECT: Query parameters appended to route
templ Pagination(c echo.Context, saID string, limit, offset int) {
    <button hx-get={ c.Echo().Reverse("transactions", saID) +
        fmt.Sprintf("?limit=%d&offset=%d", limit, offset) }>
        Next
    </button>
}

// CORRECT: templ.URL() for user-influenced URLs
templ UserLink(userURL string) {
    <a hx-get={ string(templ.URL(userURL)) }>Profile</a>
}

// IMPORTANT: URL-encode dynamic query param values
templ Search(query string) {
    <button hx-get={ fmt.Sprintf("/search?q=%s", url.QueryEscape(query)) }>Search</button>
}

HTML Escaping is Normal

Templ HTML-escapes all attribute values (" becomes "). This is correct behavior — browsers un-escape it before htmx reads the attribute via the DOM API. Never try to work around this.


Templ Component Patterns

Spread Attributes for Reusable Components

Use templ.Attributes with spread syntax to inject htmx attributes into reusable UI components. This keeps components htmx-agnostic while allowing consumers to add any htmx behavior.

// Component definition — accepts arbitrary attributes via spread
templ Button(text string, attrs templ.Attributes) {
    <button class="btn btn-primary" { attrs... }>{ text }</button>
}

// Consumer injects htmx behavior
@Button("Save", templ.Attributes{
    "hx-post":   "/api/items",
    "hx-target": "#result",
    "hx-swap":   "innerHTML",
})

// Works with templUI-style Props pattern too
@input.Input(input.Props{
    Type:  input.TypeSearch,
    Name:  "search",
    Attributes: templ.Attributes{
        "hx-get":     "/users?partial=true",
        "hx-trigger": "input changed delay:300ms",
        "hx-target":  "#users-table",
    },
})

Conditional Attributes

Use templ if blocks inside element tags for conditional htmx behavior:

// Dual-mode form: create vs edit
templ TaskForm(c echo.Context, task *Task) {
    <form
        if task != nil {
            hx-put={ fmt.Sprintf("/tasks/%d", task.ID) }
            hx-target={ fmt.Sprintf("#task-%d", task.ID) }
            hx-swap="outerHTML"
        } else {
            hx-post="/tasks"
            hx-target="#task-list"
            hx-swap="afterbegin"
        }
    >
        // form fields
    </form>
}

// Self-terminating polling (only poll while job is active)
templ JobRow(job Job) {
    if job.Status == "running" || job.Status == "pending" {
        <tr id={ "job-" + job.ID }
            hx-get={ "/api/jobs/" + job.ID + "/row" }
            hx-trigger="every 2s"
            hx-swap="outerHTML">
            @jobRowContent(job)
        </tr>
    } else {
        <tr id={ "job-" + job.ID }>
            @jobRowContent(job)
        </tr>
    }
}

// Boolean attributes
templ SubmitButton(isDisabled bool) {
    <button hx-post="/submit" disabled?={ isDisabled }>Submit</button>
}

// selected?= for option elements (cleaner than if blocks)
<option value="low" selected?={ task.Priority == "low" }>Low</option>

Separated Components for Full Page vs Partial

Extract the inner content as a separate component so the same templ renders both as a full page and as an htmx partial:

// Full page (normal request)
templ ProductDetail(c echo.Context, product Product) {
    @layouts.Main(c, product.Name) {
        <div id="product-detail">
            @ProductDetailContent(product)
        </div>
    }
}

// Partial (htmx request) — same inner component
templ ProductDetailContent(product Product) {
    <h1>{ product.Name }</h1>
    // ...
}

JavaScript and hx-on Events in Templ

Templ treats hx-on:* attributes as script attributes. They expect templ.JSFuncCall or constant strings, NOT plain Go string variables.

Correct Patterns

// CORRECT: Simple constant inline JS
templ SimpleButton() {
    <button hx-get="/items"
        hx-on::after-request="document.getElementById('spinner').classList.add('hidden')">
        Load
    </button>
}

// CORRECT: Conditional form reset on success
templ ContactForm() {
    <form hx-post="/contact"
        hx-on::after-request="if(event.detail.successful) this.reset()">
        // fields
    </form>
}

// CORRECT: templ.JSFuncCall for dynamic data
var confirmHandle = templ.NewOnceHandle()

templ DeleteButton(id string) {
    @confirmHandle.Once() {
        <script>
            function confirmDelete(id, event) {
                if (!confirm("Delete item " + id + "?")) {
                    event.preventDefault();
                }
            }
        </script>
    }
    <button hx-delete={ fmt.Sprintf("/api/items/%s", id) }
        hx-on::before-request={ templ.JSFuncCall("confirmDelete", id) }>
        Delete
    </button>
}

// CORRECT: templ.JSFuncCall for onclick with dynamic args (safely escapes values)
templ CopyButton(text string) {
    <button onclick={ templ.JSFuncCall("copyToClipboard", text) }>
        Copy
    </button>
}

// WRONG: Plain Go string variable for hx-on
templ BrokenHandler(handler string) {
    <button hx-on::click={ handler }>Click</button>
}

Event Name Syntax

<!-- All valid: -->
<button hx-on::before-request="...">        <!-- shorthand (double colon, omits htmx:) -->
<button hx-on:htmx:before-request="...">    <!-- long form -->
<button hx-on--before-request="...">         <!-- dash form (JSX-compatible) -->

<!-- WRONG: camelCase (HTML attributes are case-insensitive) -->
<button hx-on:htmx:beforeRequest="...">

Alpine.js Listening to htmx Events

// Alpine can listen to htmx events with @ syntax
<form hx-put="/tasks/1" hx-target="closest div" hx-swap="outerHTML"
    @htmx:after-request="editing = false">

Embedding Go Data in Script Tags

// {{ }} syntax inside script tags for string values
templ PageScript(endpoint string) {
    <script>
        const endpoint = "{{ endpoint }}";
    </script>
}

// templ.JSONScript for structured data (safest)
templ ItemPage(items []Item) {
    @templ.JSONScript("items-data", items)
    <script>
        const items = JSON.parse(document.getElementById('items-data').textContent);
    </script>
}

// templ.NewOnceHandle() prevents duplicate script tags in repeated components

Dynamic hx-post via JavaScript (When URL Is Unknown Until Interaction)

When the target URL depends on user interaction (e.g., editing different rows in a shared modal), set it dynamically and re-process:

const form = document.getElementById('edit-form');
form.setAttribute('hx-post', '/items/' + itemId + '/edit');
htmx.process(form);  // CRITICAL: htmx must re-scan to pick up the new attribute

Go Handler Patterns

Fragment vs Full Page

// Standard pattern with helper function
func isHTMXRequest(r *http.Request) bool {
    return r.Header.Get("HX-Request") == "true"
}

func (h *Handler) ListItems(c echo.Context) error {
    items, err := h.store.ListItems(c.Request().Context())
    if err != nil {
        return err
    }
    if isHTMXRequest(c.Request()) {
        return views.ItemList(items).Render(c.Request().Context(), c.Response().Writer)
    }
    return views.ItemsPage(c, items).Render(c.Request().Context(), c.Response().Writer)
}

Alternative: Separate Routes for Partials

Instead of checking HX-Request, use route structure:

e.GET("/items", h.ItemsPage)          // Full page
e.GET("/api/items", h.ItemsPartial)    // htmx partial

Multi-Target Response with OOB (Writing Multiple Components)

func (h *Handler) CreateAPIKey(c echo.Context) error {
    // ... create key ...
    ctx := c.Request().Context()

    // Render primary response first (goes to hx-target)
    if err := views.APIKeysList(c, keys).Render(ctx, c.Response().Writer); err != nil {
        return err
    }
    // Then render OOB component (has hx-swap-oob="true", goes to its own target)
    if err := views.NewKeyModal(c, apiKey).Render(ctx, c.Response().Writer); err != nil {
        return err
    }
    return nil
}

htmx-Aware Redirects

Always check HX-Request before redirecting — htmx ignores HTTP 302 redirects:

func Redirect(c echo.Context, url string) error {
    if c.Request().Header.Get("HX-Request") == "true" {
        c.Response().Header().Set("HX-Redirect", url)
        return c.NoContent(http.StatusOK)
    }
    return c.Redirect(http.StatusSeeOther, url)
}

Event-Driven List Reloads with HX-Trigger

Instead of OOB swaps, trigger a client-side refetch after mutations:

// Handler: signal that data changed
func (h *Handler) DeleteItem(c echo.Context) error {
    // ... delete ...
    c.Response().Header().Set("HX-Trigger", "reloadList")
    return c.NoContent(http.StatusOK)
}
// Template: list container listens for the event
<div id="items-list"
    hx-get={ c.Echo().Reverse("items-list") }
    hx-trigger="reloadList from:body"
    hx-swap="innerHTML">
    // items here
</div>

Delete with Empty Response

// Return empty 200 — htmx removes the element via hx-swap="delete" or hx-swap="outerHTML"
func (h *Handler) DeleteItem(c echo.Context) error {
    // ... delete ...
    return c.NoContent(http.StatusOK)
}

Validation Error Re-rendering

Store errors in echo context and re-render the same form component:

func (h *Handler) UpdateItem(c echo.Context) error {
    errMap := NewErrMap()
    if name == "" {
        errMap.Add("name", "Name is required")
    }
    if len(errMap) > 0 {
        c.Set("errors", errMap)
        return views.ItemForm(c, item).Render(c.Request().Context(), c.Response().Writer)
    }
    // ... save ...
}
// In templ: conditional error display
<input name="name" type="text"
    class={ "border rounded px-3 py-2",
        templ.KV("border-red-300", views.HasErrors(c, "name")),
        templ.KV("border-gray-300", !views.HasErrors(c, "name")) }>
if views.HasErrors(c, "name") {
    <p class="text-red-500 text-sm">{ views.FirstError(c, "name") }</p>
}

Swap Strategies

StrategyBehaviorWhen to Use
innerHTMLReplace inner content (default)Update container contents
outerHTMLReplace entire elementReplace a component entirely, inline edit
textContentReplace text only, no HTML parsingDisplay raw text safely
beforebeginInsert before targetAdd sibling before element
afterbeginPrepend inside targetPrepend to a list (new items first)
beforeendAppend inside targetAppend to a list (infinite scroll)
afterendInsert after targetAdd sibling after element
deleteRemove target elementDelete items from lists
noneNo swap (OOB still processed)Side-effect-only requests, HX-Redirect
morphIdiomorph morphing (extension)Preserve state/focus during updates

Swap Modifiers

Append to hx-swap value: hx-swap="innerHTML swap:500ms settle:100ms scroll:top transition:true focus-scroll:true ignoreTitle:true"


Trigger Patterns

<!-- Standard events -->
<button hx-get="/api" hx-trigger="click">Click</button>
<input hx-get="/search" hx-trigger="input changed delay:500ms" hx-target="#results">
<form hx-post="/submit" hx-trigger="submit">

<!-- Special triggers -->
<div hx-get="/content" hx-trigger="load">                  <!-- On page load -->
<div hx-get="/content" hx-trigger="revealed">               <!-- When scrolled into view -->
<div hx-get="/content" hx-trigger="intersect threshold:0.5"> <!-- Intersection observer -->
<div hx-get="/poll" hx-trigger="every 2s">                  <!-- Polling -->

<!-- Modifiers -->
<button hx-get="/api" hx-trigger="click once">              <!-- Fire once only -->
<input hx-get="/validate" hx-trigger="input changed delay:300ms"> <!-- Debounce -->
<input hx-get="/search" hx-trigger="keyup changed delay:500ms, search"> <!-- Debounce + clear button -->
<input hx-get="/search" hx-trigger="keyup throttle:500ms">  <!-- Throttle -->
<button hx-get="/api" hx-trigger="click from:body">         <!-- Listen on different element -->
<button hx-get="/api" hx-trigger="click consume">           <!-- Stop propagation -->
<button hx-get="/api" hx-trigger="click queue:last">        <!-- Queue strategy -->

<!-- Event filters (JS boolean expressions) -->
<button hx-get="/api" hx-trigger="click[ctrlKey]">          <!-- Only with Ctrl held -->
<input hx-get="/api" hx-trigger="keyup[key=='Enter']">      <!-- Only on Enter key -->

<!-- Multiple triggers -->
<div hx-get="/api" hx-trigger="click, keyup[key=='Enter'] from:body">

<!-- Event-driven trigger (from HX-Trigger response header) -->
<div hx-get="/items" hx-trigger="reloadList from:body" hx-swap="innerHTML">

Self-Terminating Polling

The best polling pattern: include hx-trigger="every Ns" only when the condition is active. When the server returns a response without the polling attributes, polling stops automatically.

templ JobRow(job Job) {
    if job.Status == "running" || job.Status == "pending" {
        <tr id={ "job-" + job.ID }
            hx-get={ "/api/jobs/" + job.ID + "/row" }
            hx-trigger="every 2s"
            hx-swap="outerHTML">
            @jobRowContent(job)
        </tr>
    } else {
        <tr id={ "job-" + job.ID }>
            @jobRowContent(job)
        </tr>
    }
}

Request/Response Headers

Request Headers (sent by htmx automatically)

HeaderValue
HX-RequestAlways "true" — do NOT set this manually via hx-headers, it's redundant
HX-TriggerID of triggering element
HX-Trigger-NameName of triggering element
HX-TargetID of target element
HX-Current-URLBrowser's current URL
HX-Boosted"true" if boosted

Response Headers (server sends to control htmx)

HeaderEffect
HX-LocationClient-side redirect without full page reload
HX-Push-UrlPush URL into browser history
HX-RedirectFull page redirect (use instead of HTTP 302 for htmx)
HX-RefreshFull page refresh if "true"
HX-Replace-UrlReplace current URL in history
HX-ReswapOverride swap strategy
HX-RetargetOverride target element (CSS selector)
HX-TriggerTrigger client-side events (JSON for multiple)
HX-Trigger-After-SwapTrigger events after swap
HX-Trigger-After-SettleTrigger events after settle

Out-of-Band (OOB) Swaps

Update multiple parts of the page from a single response:

// Go handler writes multiple components — primary first, then OOB
templ PrimaryResponse(task Task) {
    @TaskItem(task)
}

templ StatsOOB(stats Stats) {
    <div id="task-count" hx-swap-oob="true">
        { fmt.Sprint(stats.Total) } tasks
    </div>
}

// Tab state OOB update (update active tab styling alongside content)
templ FilterTabsOOB(activeFilter string) {
    <div id="filter-tabs" hx-swap-oob="outerHTML:#filter-tabs">
        // tabs with active styling
    </div>
}

// Style card OOB (two-panel sync — update sidebar card when detail panel changes)
templ StyleCardOOB(data StyleCardData) {
    <div id={ fmt.Sprintf("style-card-%s", data.StyleID) } hx-swap-oob="true"
        class="border-emerald-500 bg-emerald-500/10">
        // card content
    </div>
}

OOB Gotchas

  • OOB elements must have matching IDs on the page
  • Primary content must come first in the response
  • Table elements (<tr>, <td>) need <template> wrappers for OOB
  • If OOB target is inside the primary swap area, it may not exist when OOB runs
  • Sending only OOB content with no primary response replaces the target with nothing
  • Nested OOB is processed by default; disable with htmx.config.allowNestedOobSwaps = false

Error Handling

4xx/5xx Responses Don't Swap by Default

This is a major gotcha. Form validation returning 422 won't display errors unless configured.

Option 1: Re-render form at 200 with error state (most common in Go/templ)

The server returns HTTP 200 with the form re-rendered showing inline errors. This avoids the 4xx swap problem entirely.

Option 2: response-targets extension

<script src="https://cdn.jsdelivr.net/npm/htmx-ext-response-targets@2.0.4"></script>
<div hx-ext="response-targets">
    <form hx-post="/register"
        hx-target="#success"
        hx-target-422="#validation-errors"
        hx-target-5*="#server-error">
    </form>
</div>

Option 3: HX-Retarget response header

if c.Request().Header.Get("HX-Request") == "true" {
    c.Response().Header().Set("HX-Retarget", "#error-container")
    return views.ErrorAlert(message).Render(c.Request().Context(), c.Response().Writer)
}

Option 4: beforeSwap event

document.body.addEventListener('htmx:beforeSwap', function(event) {
    if (event.detail.xhr.status === 422) {
        event.detail.shouldSwap = true;
        event.detail.isError = false;
    }
});

Filter State Preservation

When building filter/search UIs, use hx-include to carry all filter values and hx-push-url for bookmarkable URLs:

templ ProductFilters(sortBy, sortDir, brand, category string) {
    // Hidden inputs carry state across filter changes
    <input type="hidden" name="sort" value={ sortBy }/>
    <input type="hidden" name="dir" value={ sortDir }/>
    <input type="hidden" name="category" value={ category }/>

    <select name="brand"
        hx-get="/products"
        hx-trigger="change"
        hx-target="#products-table"
        hx-include="[name='q'],[name='sort'],[name='dir'],[name='category']"
        hx-push-url="true">
        // options
    </select>

    <input type="search" name="q"
        hx-get="/products"
        hx-trigger="input changed delay:300ms, search"
        hx-target="#products-table"
        hx-include="[name='brand'],[name='sort'],[name='dir'],[name='category']"
        hx-push-url="true">
}

Forms and File Uploads

File Upload with Auto-Submit on Selection

// Hidden file input triggered by a styled button — uploads immediately on selection
<input type="file" accept="image/*" multiple
    class="hidden"
    x-ref="fileInput"
    hx-post={ fmt.Sprintf("/items/%s/images", item.ID) }
    hx-trigger="change"
    hx-target="#images-section"
    hx-swap="innerHTML"
    hx-encoding="multipart/form-data"
    name="images"/>
<button @click="$refs.fileInput.click()">Upload Images</button>

File Upload with Progress and Disabled Submit

<form hx-post="/upload" hx-encoding="multipart/form-data"
    hx-indicator="#upload-spinner" hx-disabled-elt="button[type=submit]">
    <input type="file" name="document">
    <button type="submit">
        <span>Upload</span>
        <span id="upload-spinner" class="htmx-indicator">Uploading...</span>
    </button>
</form>

Include External Values

<!-- Pull in values from outside the form -->
<input id="global-filter" name="filter" value="active">
<form hx-post="/search" hx-include="#global-filter">
    <input name="query" type="text">
    <button type="submit">Search</button>
</form>

<!-- Include a subset of a larger form -->
<button hx-post="/items/add-color" hx-encoding="multipart/form-data"
    hx-include="#add-color-form">Add Color</button>

Radio/Checkbox Auto-Submit

// Radio buttons that auto-submit on change (default trigger for inputs)
<input type="radio" name={ fmt.Sprintf("primary-image-%s", productID) }
    value={ img.ID }
    checked?={ img.IsPrimary }
    hx-put={ fmt.Sprintf("/images/%s/set-primary", img.ID) }
    hx-target="#images-grid"
    hx-swap="outerHTML"
    hx-indicator="none">

Inline Editing Pattern

The most common htmx pattern in Go/templ apps:

// Read-only row
templ EntryRow(entry Entry) {
    <tr id={ fmt.Sprintf("entry-%d", entry.ID) }>
        <td>{ entry.Name }</td>
        <td>
            <button hx-get={ fmt.Sprintf("/entries/%d/edit", entry.ID) }
                hx-target={ fmt.Sprintf("#entry-%d", entry.ID) }
                hx-swap="outerHTML">Edit</button>
            <button hx-delete={ fmt.Sprintf("/entries/%d", entry.ID) }
                hx-target={ fmt.Sprintf("#entry-%d", entry.ID) }
                hx-swap="delete"
                hx-confirm="Are you sure?">Delete</button>
        </td>
    </tr>
}

// Edit form (replaces the row)
templ EntryEditForm(entry Entry) {
    <tr id={ fmt.Sprintf("entry-%d", entry.ID) }>
        <td><input name="name" value={ entry.Name } form={ fmt.Sprintf("edit-form-%d", entry.ID) }></td>
        <td>
            <form id={ fmt.Sprintf("edit-form-%d", entry.ID) }
                hx-put={ fmt.Sprintf("/entries/%d", entry.ID) }
                hx-target={ fmt.Sprintf("#entry-%d", entry.ID) }
                hx-swap="outerHTML">
                <button type="submit">Save</button>
            </form>
            <button hx-get={ fmt.Sprintf("/entries/%d", entry.ID) }
                hx-target={ fmt.Sprintf("#entry-%d", entry.ID) }
                hx-swap="outerHTML">Cancel</button>
        </td>
    </tr>
}

Alpine.js + htmx Integration

Separation of Concerns

Use htmx for server communication, Alpine for client-side UI state:

// Alpine dropdown + htmx server action
<div x-data="{ open: false }">
    <button @click="open = !open">Actions</button>
    <div x-show="open" @click.away="open = false" x-transition>
        <button hx-post={ "/api/scrape/" + brand }
            hx-swap="none"
            @click="open = false">
            Full Scrape
        </button>
    </div>
</div>

Alpine Reacting to htmx Events

// Alpine state updates based on htmx lifecycle
<div x-data="{ loading: false }"
    @htmx:before-request.window="loading = true"
    @htmx:after-request.window="loading = false">
    <div x-show="loading">Loading...</div>
</div>

Dynamic Alpine-bound htmx Attributes

When Alpine dynamically sets hx-* attributes, htmx doesn't see them because it scanned at page load. Call htmx.process() to re-scan:

<button :hx-post="'/api/favorites/' + productId"
    hx-swap="outerHTML"
    x-init="htmx.process($el)">

Loading Indicators

<!-- Built-in indicator pattern -->
<button hx-get="/api" hx-indicator="#spinner">Load</button>
<span id="spinner" class="htmx-indicator">Loading...</span>

<!-- CSS for show/hide indicators -->
<style>
.htmx-indicator { display: none; }
.htmx-request .htmx-indicator { display: inline-flex; }
.htmx-request.htmx-indicator { display: inline-flex; }
.htmx-indicator-hide { }
.htmx-request .htmx-indicator-hide { display: none; }
</style>

<!-- Toggle text during request -->
<button hx-post="/save" hx-indicator="this">
    <span class="htmx-indicator-hide">Save</span>
    <span class="htmx-indicator">Saving...</span>
</button>

<!-- Disable button during request -->
<button hx-post="/save" hx-disabled-elt="this">Save</button>

<!-- Disable all form controls -->
<form hx-post="/submit" hx-disabled-elt="find input, find button">

htmx Sync Strategies

Prevent request conflicts with hx-sync:

<!-- Replace in-flight request with new one (best for search inputs) -->
<input hx-get="/search" hx-trigger="input changed delay:300ms" hx-sync="this:replace">

<!-- Abort in-flight request, send new one -->
<button hx-get="/api" hx-sync="this:abort">Load</button>

<!-- Queue requests, keep only the last -->
<button hx-get="/api" hx-sync="this:queue last">Load</button>

<!-- Sync with a different element (abort validation on form submit) -->
<form hx-post="/submit">
    <input hx-get="/validate" hx-sync="closest form:abort">
    <button type="submit">Submit</button>
</form>

Target Selectors

Extended CSS selectors for hx-target:

<button hx-get="/api" hx-target="this">                  <!-- The element itself -->
<button hx-get="/api" hx-target="closest div">            <!-- Nearest ancestor div -->
<button hx-get="/api" hx-target="closest tr">             <!-- Nearest table row -->
<button hx-get="/api" hx-target="next .result">           <!-- Next sibling matching -->
<button hx-get="/api" hx-target="previous .result">       <!-- Previous sibling matching -->
<button hx-get="/api" hx-target="find .child">            <!-- Descendant matching -->
<button hx-get="/api" hx-target="#specific-id">            <!-- Standard CSS selector -->

Common Extensions

json-enc — Send JSON Bodies

<script src="https://cdn.jsdelivr.net/npm/htmx-ext-json-enc@2.0.1"></script>
<form hx-post="/api/users" hx-ext="json-enc">
    <input name="name" value="John">
    <button type="submit">Create</button>
</form>

SSE — Server-Sent Events

<script src="https://cdn.jsdelivr.net/npm/htmx-ext-sse@2.2.4"></script>
<div hx-ext="sse" sse-connect="/events" sse-swap="message">Waiting...</div>

<!-- SSE triggers a separate HTTP request -->
<div hx-ext="sse" sse-connect="/events">
    <div hx-get="/latest" hx-trigger="sse:data-changed">Loads on SSE event</div>
</div>

WebSockets

<script src="https://cdn.jsdelivr.net/npm/htmx-ext-ws@2.0.4"></script>
<div hx-ext="ws" ws-connect="/chat">
    <div id="messages"></div>
    <form ws-send>
        <input name="message" type="text">
        <button type="submit">Send</button>
    </form>
</div>

head-support, preload, loading-states

<script src="https://cdn.jsdelivr.net/npm/htmx-ext-head-support@2.0.3"></script>
<script src="https://cdn.jsdelivr.net/npm/htmx-ext-preload@2.1.0"></script>
<script src="https://cdn.jsdelivr.net/npm/htmx-ext-loading-states@2.0.0"></script>

JavaScript Event Patterns

Event Delegation (Required for Swapped Content)

// CORRECT: Listen on body or a stable parent — catches events from dynamically swapped content
document.body.addEventListener('htmx:afterSwap', function(event) {
    if (event.detail.elt.id === 'my-form') { /* ... */ }
});

// CORRECT: htmx helper
htmx.on('htmx:afterSwap', function(event) { /* ... */ });

// WRONG: Direct listener on element that may be swapped out
document.querySelector('#my-button').addEventListener('htmx:afterSwap', fn);

afterSwap vs afterSettle Timing

// afterSwap: Content in DOM but transitions NOT started — don't init JS libraries here
// afterSettle: DOM fully settled, transitions started — safe for initialization

// BEST: Use htmx.onLoad for initializing JS on new content
htmx.onLoad(function(content) {
    initializeTooltips(content);
    initializeCharts(content);
});

Programmatic Search Clear

// Clear search and re-trigger htmx request
document.getElementById('search').value = '';
htmx.trigger(document.getElementById('search'), 'keyup');

Common Anti-Patterns

Anti-PatternWhy It's WrongCorrect Approach
hx-vals={fmt.Sprintf(\{"msg": "%s"}, userInput)}JSON injection if value has " or \Use json.Marshal helper or %q
hx-swap="none" + window.location.reload()Defeats htmx purpose entirelyReturn HTML fragment and swap, or use HX-Redirect
hx-swap="none" with no feedbackUser clicks, nothing visible happensAdd hx-indicator, return content, or use HX-Trigger for list reload
hx-target="body" for navigation-like actionsLoses all client state, scroll positionUse <a href> links or HX-Redirect
hx-headers='{"HX-Request": "true"}' on bodyhtmx already sets this header automaticallyRemove — it's redundant
hx-post on both <form> AND <button>Button's attributes override form's target/swapPut hx-post on the form OR the button, not both
Duplicate IDs (e.g., wrapper and loader both id="items")hx-target matches the first one, undefined behaviorUse unique IDs
Loading htmx as async/defer/moduleUnreliable initializationUse standard blocking <script> tag
Loading different htmx versions on the same pageUndefined behavior, version conflictsUse one version in the base layout only
Expecting 4xx/5xx to swap contentThey don't by defaultRe-render at 200 with errors, or use response-targets
Not checking HX-Request for redirectsHTTP 302 is ignored by htmxUse HX-Redirect header for htmx requests
GET requests expecting form valuesGET doesn't include enclosing form dataUse hx-include="closest form" for GET
Using fetch() alongside htmx in the same pageInconsistent patterns, harder to maintainPick one approach per page/feature
Mixing htmx.ajax() and hx-* attributesConfusing dual paradigmsPrefer attributes; use htmx.ajax() only when attributes can't work
Not URL-encoding dynamic query paramssearch=foo&bar=baz breaks URLsUse url.QueryEscape() for user-supplied values

CSRF Protection Pattern (Go + Templ)

// Set CSRF token on body so ALL htmx requests include it via attribute inheritance
// Use %q (not %s) to safely handle special characters in the token
templ Layout(c echo.Context, content templ.Component) {
    <html>
    <body hx-headers={ fmt.Sprintf(`{"X-CSRF-Token": %q}`, CSRFToken(c)) }>
        @content
    </body>
    </html>
}

Configuration

<!-- Via meta tag (before htmx script) -->
<meta name="htmx-config" content='{
    "defaultSwapStyle": "outerHTML",
    "selfRequestsOnly": true,
    "historyCacheSize": 10,
    "timeout": 5000,
    "globalViewTransitions": false,
    "scrollBehavior": "instant"
}'>

Key settings:

  • defaultSwapStyle (default: innerHTML) — change if you prefer outerHTML
  • selfRequestsOnly (default: true) — only allow requests to same domain
  • historyCacheSize (default: 10) — pages cached for history
  • allowScriptTags (default: true) — execute scripts in swapped content
  • disableInheritance (default: false) — disable attribute inheritance from parents
  • timeout (default: 0) — request timeout in ms

Debug Logging (Conditional)

if config.GetHtmxLogging(c) {
    <script>htmx.logAll();</script>
}

Useful Go Libraries

  • github.com/angelofallars/htmx-go — Type-safe htmx response headers and request detection
  • github.com/donseba/go-htmx — Seamless htmx integration with partial render support
  • github.com/will-wow/typed-htmx-go — Type-safe htmx attributes for templ with autocomplete

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