{"id":28135,"date":"2024-11-24T13:29:25","date_gmt":"2024-11-24T05:29:25","guid":{"rendered":"https:\/\/fwq.ai\/blog\/28135\/"},"modified":"2024-11-24T13:29:25","modified_gmt":"2024-11-24T05:29:25","slug":"javascript%e4%b8%ad%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96textarea%e5%85%83%e7%b4%a0%e7%9a%84%e5%80%bc%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/28135\/","title":{"rendered":"JavaScript\u4e2d\u5982\u4f55\u83b7\u53d6textarea\u5143\u7d20\u7684\u503c\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173140513640968.jpg\" class=\"aligncenter\" title=\"JavaScript\u4e2d\u5982\u4f55\u83b7\u53d6textarea\u5143\u7d20\u7684\u503c\uff1f\u63d2\u56fe\" alt=\"JavaScript\u4e2d\u5982\u4f55\u83b7\u53d6textarea\u5143\u7d20\u7684\u503c\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>javascript\u4e2dtextarea\u5143\u7d20\u7684\u503c\u83b7\u53d6\u65b9\u6cd5<\/strong><\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u83b7\u53d6textarea\u5143\u7d20\u7684\u503c\u65f6\uff0c\u4f7f\u7528innerText\u65b9\u6cd5\u65e0\u6548\u3002\u5176\u4ed6\u65b9\u6cd5\u662f\u5426\u53ef\u884c\uff1f<\/p>\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n<p>JavaScript\u4e2d\u83b7\u53d6textarea\u5143\u7d20\u503c\u7684\u63a8\u8350\u65b9\u6cd5\u662f\u4f7f\u7528.value\u5c5e\u6027\uff0c\u800c\u4e0d\u662f.innerHTML\u5c5e\u6027\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u539f\u56e0\uff1a<\/strong><\/p>\n<ul>\n<li>\u6587\u6863\u7ea6\u5b9a\u8868\u5355\u63a7\u4ef6\uff08\u5982textarea\uff09\u7684\u503c\u5e94\u901a\u8fc7.value\u83b7\u53d6\u3002<\/li>\n<li>textarea\u5143\u7d20\u867d\u7136\u5177\u6709\u5185\u90e8HTML\u5185\u5bb9\uff0c\u4f46\u5185\u90e8\u4f7f\u7528Shadow DOM\u5b9e\u73b0\uff0c\u5bfc\u81f4.innerHTML\u83b7\u53d6\u4e0d\u5230\u503c\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>var text = document.getElementById(\"text\");\nvar btn = document.getElementById(\"btn\");\nbtn.onclick = function () {\n  console.log(text.value); \/\/ \u6b63\u786e\u83b7\u53d6\u503c\n};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u76f8\u5173\u80cc\u666f\u77e5\u8bc6\uff1a<\/strong><\/p>\n<ul>\n<li>Shadow DOM\u662fWeb Components\u89c4\u8303\u7684\u4e00\u90e8\u5206\uff0c\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u521b\u5efa\u72ec\u7acb\u4e8e\u9875\u9762\u4e3b\u6587\u6863\u7684DOM\u3002<\/li>\n<li>\u5bf9\u4e8e\u8868\u5355\u63a7\u4ef6\uff0c\u4f7f\u7528.value\u5c5e\u6027\u83b7\u53d6\u503c\u662f\u66f4\u7b26\u5408\u6807\u51c6\u548c\u63a8\u8350\u7684\u505a\u6cd5\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fJavaScript\u4e2d\u5982\u4f55\u83b7\u53d6textarea\u5143\u7d20\u7684\u503c\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>javascript\u4e2dtextarea\u5143\u7d20\u7684\u503c\u83b7\u53d6\u65b9\u6cd5 \u95ee\u9898\uff1a \u83b7\u53d6textarea\u5143\u7d20\u7684\u503c\u65f6\uff0c\u4f7f\u7528innerText\u65b9\u6cd5\u65e0\u6548\u3002\u5176\u4ed6\u65b9\u6cd5\u662f\u5426\u53ef\u884c\uff1f \u7b54\u6848\uff1a JavaScript\u4e2d\u83b7\u53d6textarea\u5143\u7d20\u503c\u7684\u63a8\u8350\u65b9\u6cd5\u662f\u4f7f\u7528.value\u5c5e\u6027\uff0c\u800c\u4e0d\u662f.innerHTML\u5c5e\u6027\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u539f\u56e0\uff1a \u6587\u6863\u7ea6\u5b9a\u8868\u5355\u63a7\u4ef6\uff08\u5982textarea\uff09\u7684\u503c\u5e94\u901a\u8fc7.value\u83b7\u53d6\u3002 textarea\u5143\u7d20\u867d\u7136\u5177\u6709\u5185\u90e8HTML\u5185\u5bb9\uff0c\u4f46\u5185\u90e8\u4f7f\u7528Shadow DOM\u5b9e\u73b0\uff0c\u5bfc\u81f4.innerHTML\u83b7\u53d6\u4e0d\u5230\u503c\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a var text = document.getElementById(&#8220;text&#8221;); 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