[#0x0053] 阻止 form submit 的方法

本文深入探讨了如何在HTML表单中自定义提交逻辑和验证过程,通过使用`<form onsubmit=...>`和`<input type=submit onclick=...>`元素实现表单提交前的复杂验证和控制,确保数据的有效性和安全性。通过实例展示了如何在表单提交前执行校验函数,以及如何针对不同操作(如撤销)编写特定的逻辑,确保用户交互的高效性和用户体验。

有两个地方可以可以阻止form submit,一是<form onsubmit="">,而是<form>下的<input type="submit" onclick="">,只要这两个函数有一个是return false;,那么点击这个button并不会submit form。

 

具体的执行流程是这样的:

if (submitInput.onclick() == false) {
	// 不触发 form.onsubmit();
	// form 不提交;
} else {
	// 触发 form.onsubmit();
	if (form.onsubmit() == false) {
		// form 不提交
	} else {
		// 提交 form
	}
}

 

所以在这个两个函数里面可以加一些验证工作,同时,可以根据验证结果来判断是否提交form。

比如有:

var checkForm = function() {
	// 获取输入
	if (校验失败)
		return false;
	else
		return true;
}

 

然后把这个函数写到onsubmit或是onclick,也可以针对不同的button写不同的逻辑的校验函数,比如这样:

<html>
	<form onsubmit="return checkFormStep2();" method="post" action="/XXX.do">
		<input type="text" id="username">
		<input type="password" id="password">

		<input type="submit" onclick="return checkFormStep1();" value="go" />
	</form>
</html>

在点击时先执行checkFormStep1(),在form提交前再执行checkFormStep2(),两个都通过都return true了才提交

 

也可以针对“撤销”功能的按钮写一些类似清空输入的功能,再禁止它提交form,比如这样:

<html>
	<form method="post" action="/XXX.do">
		<input type="text" id="username">
		<input type="password" id="password">

		<input type="submit" onclick="return checkFormStep();" value="go" />
		<input type="submit" onclick="clearInput(); return false;" value="reset" />
	</form>
</html>

 

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rel="stylesheet" crossorigin="" href="http://10.244.1.179:3000/_app/immutable/assets/35.DUP86x5U.css"></head> <body data-sveltekit-preload-data="hover"> <div style="display: contents"> <script> { __sveltekit_1baewk5 = { base: "" }; const element = document.currentScript.parentElement; Promise.all([ import("/_app/immutable/entry/start.CWjHXy_1.js"), import("/_app/immutable/entry/app.C1Q9Thd4.js") ]).then(([kit, app]) => { kit.start(app, element); }); } </script> <div class="w-full h-screen max-h-[100dvh] text-white relative"><div class="w-full h-full absolute top-0 left-0 bg-white dark:bg-black"></div> <div class="w-full absolute top-0 left-0 right-0 h-8 drag-region"></div> <div class="fixed m-10 z-50"><div class="flex space-x-2"><div class="self-center"><img id="logo" crossorigin="anonymous" src="/static/splash.png" class="w-6 rounded-full" alt="logo"></div></div></div> <div class="fixed bg-transparent min-h-screen w-full flex justify-center font-primary z-50 text-black dark:text-white"><div class="w-full sm:max-w-md px-10 min-h-screen flex flex-col text-center"><div class="my-auto pb-10 w-full dark:text-gray-100"><form class="flex flex-col justify-center"><div class="mb-1"><div class="text-2xl font-medium">Sign in to NexaAI</div> </div> <div class="flex flex-col mt-4"> <div class="mb-2"><div class="text-sm font-medium text-left mb-1">メールアドレス</div> <input type="email" class="my-0.5 w-full text-sm outline-hidden bg-transparent" autocomplete="email" name="email" placeholder="メールアドレスを入力してください" required=""></div> <div><div class="text-sm font-medium text-left mb-1">パスワード</div> <input type="password" class="my-0.5 w-full text-sm outline-hidden bg-transparent" placeholder="パスワードを入力してください" autocomplete="current-password" name="current-password" required=""></div></div> <div class="mt-5"><button class="bg-gray-700/5 hover:bg-gray-700/10 dark:bg-gray-100/5 dark:hover:bg-gray-100/10 dark:text-gray-300 dark:hover:text-white transition w-full rounded-full font-medium text-sm py-2.5" type="submit">サインイン</button> <div class="mt-4 text-sm text-center">アカウントをお持ちではありませんか? <button class="font-medium underline" type="button">サインアップ</button></div></div></form> </div></div></div></div> <div id="svelte-announcer" aria-live="assertive" aria-atomic="true" style="position: absolute; left: 0px; top: 0px; clip: rect(0px, 0px, 0px, 0px); clip-path: inset(50%); overflow: hidden; white-space: nowrap; width: 1px; height: 1px;">NexaAI</div></div> <style type="text/css" nonce=""> html { overflow-y: hidden !important; } #splash-screen { background: #fff; } html.dark #splash-screen { background: #000; } html.her #splash-screen { background: #983724; } #logo-her { display: none; } #progress-background { display: none; } #progress-bar { display: none; } html.her #logo { display: none; } html.her #logo-her { display: block; filter: invert(1); } html.her #progress-background { display: block; } html.her #progress-bar { display: block; } @media (max-width: 24rem) { html.her #progress-background { display: none; } html.her #progress-bar { display: none; } } @keyframes pulse { 50% { opacity: 0.65; } } .animate-pulse-fast { animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite; } </style> </body></html> === 页面 HTML 内容结束 === 共找到 2 个可点击元素 正在点击第 1 个元素:标签=button, 文本=&#39;サインイン&#39;, 位置={&#39;x&#39;: 280, &#39;y&#39;: 464} 无法点击第 1 个元素:Message: stale element reference: stale element not found in the current frame (Session info: chrome=138.0.7204.184); For documentation on this error, please visit: https://www.selenium.dev/documentation/webdriver/troubleshooting/errors#staleelementreferenceexception Stacktrace: GetHandleVerifier [0x0x7ff64386e415+77285] GetHandleVerifier [0x0x7ff64386e470+77376] (No symbol) [0x0x7ff643639a6a] (No symbol) [0x0x7ff643641419] (No symbol) [0x0x7ff6436444cc] (No symbol) [0x0x7ff64364459f] (No symbol) [0x0x7ff6436925ed] (No symbol) [0x0x7ff6436833c3] (No symbol) [0x0x7ff6436b860a] (No symbol) [0x0x7ff643682d06] (No symbol) [0x0x7ff6436b8820] (No symbol) [0x0x7ff6436e087f] (No symbol) [0x0x7ff6436b83e3] (No symbol) [0x0x7ff643681521] (No symbol) [0x0x7ff6436822b3] GetHandleVerifier [0x0x7ff643b51efd+3107021] GetHandleVerifier [0x0x7ff643b4c29d+3083373] GetHandleVerifier [0x0x7ff643b6bedd+3213485] GetHandleVerifier [0x0x7ff64388884e+184862] GetHandleVerifier [0x0x7ff64389055f+216879] GetHandleVerifier [0x0x7ff643877084+113236] GetHandleVerifier [0x0x7ff643877239+113673] GetHandleVerifier [0x0x7ff64385e298+11368] BaseThreadInitThunk [0x0x7ff83b8c259d+29] RtlUserThreadStart [0x0x7ff83be4af78+40] 无法点击第 2 个元素:Message: stale element reference: stale element not found in the current frame (Session info: chrome=138.0.7204.184); For documentation on this error, please visit: https://www.selenium.dev/documentation/webdriver/troubleshooting/errors#staleelementreferenceexception Stacktrace: GetHandleVerifier [0x0x7ff64386e415+77285] GetHandleVerifier [0x0x7ff64386e470+77376] (No symbol) [0x0x7ff643639a6a] (No symbol) [0x0x7ff643641419] (No symbol) [0x0x7ff643644811] (No symbol) [0x0x7ff6436e1c0b] (No symbol) [0x0x7ff6436b860a] (No symbol) [0x0x7ff6436e087f] (No symbol) [0x0x7ff6436b83e3] (No symbol) [0x0x7ff643681521] (No symbol) [0x0x7ff6436822b3] GetHandleVerifier [0x0x7ff643b51efd+3107021] GetHandleVerifier [0x0x7ff643b4c29d+3083373] GetHandleVerifier [0x0x7ff643b6bedd+3213485] GetHandleVerifier [0x0x7ff64388884e+184862] GetHandleVerifier [0x0x7ff64389055f+216879] GetHandleVerifier [0x0x7ff643877084+113236] GetHandleVerifier [0x0x7ff643877239+113673] GetHandleVerifier [0x0x7ff64385e298+11368] BaseThreadInitThunk [0x0x7ff83b8c259d+29] RtlUserThreadStart [0x0x7ff83be4af78+40] Process finished with exit code 0
08-09
//提交添加帧 const submitForm = async () => { try { await formRef.value.validate() const message = frameArray.value.length === 0 ? &#39;帧结构与协议之后无法切换,确认提交?&#39; : &#39;确认提交?&#39; ElMessageBox.confirm(message, &#39;添加帧&#39;, { confirmButtonText: &#39;确定&#39;, cancelButtonText: &#39;取消&#39;, type: &#39;warning&#39; }).then(() => { // 设置自动填充的值 console.log(currentProtocol.value) frameFrom.value.frameheadId = currentFramehead.value.frameheadId frameFrom.value.protocolId = currentProtocol.value.nprotocolId //frameFrom拼接到frame上 frame.value = { ...frame.value, ...frameFrom.value } // 添加到数组 frameArray.value.push(frame.value) // 这里处理提交逻辑 console.log(&#39;提交数据frameArray:&#39;, frameArray.value) addFrameDialogVisible.value = false }) } catch (error) { console.error(&#39;表单验证失败:&#39;, error) } } <el-button type="primary" :icon="Edit" v-if="selectedFrame" @click="frameEdit" circle style="margin-bottom: 0.125rem" /> <el-select v-model="selectedFrameIdcode" placeholder="选择帧" class="frame-select" clearable > <el-option v-for="item in frameArray" :key="item.frameIdcode" :label="item.name" :value="item.frameIdcode" /> </el-select>const selectedFrame = computed(() => { return frameArray.value.find( (item) => item.frameIdcode === selectedFrameIdcode.value ) }) //选择的帧的详细信息<!-- 新增帧弹窗 --> <el-dialog title="新增帧" v-model="addFrameDialogVisible" width="30%" @close="resetForm" ><el-form :model="frameFrom" :rules="rules" ref="formRef" label-width="100px" > <!-- 帧编码 --> <el-form-item label="帧编码" prop="frameIdcode"> <el-input v-model="frameFrom.frameIdcode" placeholder="请输入16进制编码" ><template #prepend>0x</template></el-input > </el-form-item> <!-- 名称 --> <el-form-item label="名称" prop="name"> <el-input v-model="frameFrom.name" placeholder="请输入名称" maxlength="20" show-word-limit /> </el-form-item> <!-- 描述 --> <el-form-item label="描述" prop="desc"> <el-input v-model="frameFrom.desc" type="textarea" :rows="3" placeholder="请输入描述" maxlength="255" show-word-limit /> </el-form-item></el-form ><template #footer> <el-button @click="addFrameDialogVisible = false">取消</el-button> <el-button type="primary" @click="submitForm">确定</el-button> </template></el-dialog > 实现frameEdit
04-01
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