55 lines
1.3 KiB
HTML
55 lines
1.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>留言字数限制</title>
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<style>
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body {
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margin: 0;
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padding: 0;
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}
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.main {
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width: 400px;
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height: 200px;
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border: 1px solid #000;
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position: relative;
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}
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.main span {
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position: absolute;
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right: 10px;
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bottom: 10px;
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}
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textarea {
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width: 100%;
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height: 100%;
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resize: none;
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}
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</style>
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</head>
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<body>
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<div class="main">
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<textarea name="" id="" cols="30" rows="10"></textarea>
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<span>0/10</span>
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</div>
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</body>
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<script>
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var numberLength = 10;
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var text = document.querySelector("textarea");
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var span = document.querySelector("span");
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text.oninput = function () {
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if (numberLength - text.value.length > 0) {
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var tipsText = `${text.value.length}/剩余${numberLength - text.value.length}`
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span.innerText = tipsText;
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} else {
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text.value = text.value.substring(0,numberLength)
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span.innerText = '超过字数限制';
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}
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}
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</script>
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</html> |