{"id":300652,"date":"2024-05-20T17:48:15","date_gmt":"2024-05-20T09:48:15","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/300652.html"},"modified":"2024-05-20T17:48:33","modified_gmt":"2024-05-20T09:48:33","slug":"%e5%a6%82%e4%bd%95%e7%94%a8-jq-%e8%8e%b7%e5%8f%96-input-%e7%9a%84-value-%e5%80%bc","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/300652.html","title":{"rendered":"\u5982\u4f55\u7528 jq \u83b7\u53d6 input \u7684 value \u503c"},"content":{"rendered":"

\"\u5982\u4f55\u7528<\/p>\n

\u8981\u4f7f\u7528jQuery\uff08\u901a\u5e38\u7b80\u79f0\u4e3ajq\uff09\u83b7\u53d6\u8f93\u5165\u5b57\u6bb5\uff08input\uff09\u7684value\u503c\u662f\u975e\u5e38\u7b80\u5355\u7684\uff1a\u9996\u5148\u9009\u62e9\u5bf9\u5e94\u7684input\u5143\u7d20\uff0c\u7136\u540e\u8c03\u7528.val()<\/code>\u65b9\u6cd5\u5373\u53ef\u3002\u9009\u62e9\u5668\u7b80\u6d01\u3001\u65b9\u6cd5\u76f4\u89c2<\/strong>\uff0c\u8fd9\u662fjQuery\u7684\u4e3b\u8981\u4f18\u70b9\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u83b7\u53d6\u4e00\u4e2aid\u4e3a\u201cusername\u201d\u7684input\u5143\u7d20\u7684\u503c\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528$('#username').val()<\/code>\u8fd9\u884c\u4ee3\u7801\u3002\u5173\u952e\u5728\u4e8e\u4f7f\u7528\u5408\u9002\u7684\u9009\u62e9\u5668<\/strong>\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u7075\u6d3b\u5730\u83b7\u53d6\u5404\u79cdinput\u5143\u7d20\u7684\u503c\uff0c\u65e0\u8bba\u662f\u901a\u8fc7ID\u3001\u7c7b\u540d\u8fd8\u662f\u5c5e\u6027\u9009\u62e9\u5668\u7b49\u3002<\/p>\n<\/p>\n

\u4e00\u3001JQUERY\u9009\u62e9\u5668\u7684\u4f7f\u7528<\/h3>\n<\/p>\n

\u5728\u83b7\u53d6input\u5143\u7d20\u7684\u503c\u524d\uff0c\u9996\u5148\u8981\u719f\u6089jQuery\u4e2d\u4e0d\u540c\u7c7b\u578b\u7684\u9009\u62e9\u5668\u548c\u5b83\u4eec\u7684\u4f7f\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

1. ID\u9009\u62e9\u5668<\/h4>\n<\/p>\n

\u5982\u679cinput\u5143\u7d20\u6709\u4e00\u4e2a\u552f\u4e00\u7684ID\uff0c\u4f7f\u7528ID\u9009\u62e9\u5668\u662f\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u3002\u5982\uff1a<\/p>\n<\/p>\n

var inputValue = $('#inputId').val();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u83b7\u53d6\u4e86ID\u4e3ainputId<\/code>\u7684input\u5143\u7d20\u7684value\u503c\u3002<\/p>\n<\/p>\n
2. \u7c7b\u9009\u62e9\u5668<\/h4>\n<\/p>\n
\u7c7b\u9009\u62e9\u5668\u7528\u4e8e\u9009\u62e9\u5177\u6709\u76f8\u540c\u7c7b\u540d\u7684\u6240\u6709input\u5143\u7d20\u3002\u5982\uff1a<\/p>\n<\/p>\n
$('.inputClass').each(function() {<\/p>\n
    var inputValue = $(this).val();<\/p>\n
    \/\/ Do something with each input's value<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be5\u4ee3\u7801\u904d\u5386\u6240\u6709\u7c7b\u540d\u4e3ainputClass<\/code>\u7684input\u5143\u7d20\uff0c\u5e76\u83b7\u53d6\u5b83\u4eec\u7684value\u3002<\/p>\n<\/p>\n
3. \u5c5e\u6027\u9009\u62e9\u5668<\/h4>\n<\/p>\n
\u5f53input\u5143\u7d20\u9700\u8981\u901a\u8fc7\u7279\u5b9a\u5c5e\u6027\u6765\u9009\u62e9\u65f6\uff0c\u5c5e\u6027\u9009\u62e9\u5668\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u8981\u9009\u62e9\u6240\u6709\u7c7b\u578b\uff08type\uff09\u4e3atext\u7684input\u5143\u7d20\uff1a<\/p>\n<\/p>\n
$('input[type="text"]').each(function() {<\/p>\n
    var inputValue = $(this).val();<\/p>\n
    \/\/ Do something with each input's value<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u83b7\u53d6\u4e0e\u64cd\u4f5c\u8f93\u5165\u503c<\/h3>\n<\/p>\n
\u5728\u9009\u62e9\u6b63\u786e\u7684input\u5143\u7d20\u540e\uff0c\u4e0b\u4e00\u6b65\u662f\u83b7\u53d6\u4e0e\u64cd\u7eb5\u8fd9\u4e9b\u503c\u3002<\/p>\n<\/p>\n
1. \u83b7\u53d6\u8f93\u5165\u503c<\/h4>\n<\/p>\n
\u901a\u8fc7.val()<\/code>\u65b9\u6cd5<\/strong>\uff0c\u53ef\u4ee5\u8bfb\u53d6\u4efb\u4f55input\u5143\u7d20\u7684\u5f53\u524d\u503c\u3002\u4e3e\u4f8b\u6765\u8bf4\uff1a<\/p>\n<\/p>\n
var emAI<\/a>lValue = $('#email').val();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u83b7\u53d6\u4e86id\u4e3aemail<\/code>\u7684input\u5143\u7d20\u5f53\u524d\u7684value\u3002<\/p>\n<\/p>\n
2. \u8bbe\u7f6e\u8f93\u5165\u503c<\/h4>\n<\/p>\n
\u4e0e\u83b7\u53d6\u503c\u7c7b\u4f3c\u5730\uff0c\u53ef\u4ee5\u4f7f\u7528.val()<\/code>\u65b9\u6cd5\u6765\u8bbe\u7f6einput\u7684\u503c\u3002\u901a\u8fc7\u4f20\u9012\u4e00\u4e2a\u65b0\u503c\u7ed9.val()<\/code>\u65b9\u6cd5\uff0c\u53ef\u4ee5\u66f4\u65b0input\u5143\u7d20\u7684value\uff1a<\/p>\n<\/p>\n
$('#email').val('user@example.com');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be5\u884c\u4ee3\u7801\u5c06id\u4e3aemail<\/code>\u7684input\u5143\u7d20\u7684\u503c\u8bbe\u7f6e\u4e3auser@example.com<\/code>\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u9ad8\u7ea7\u9009\u62e9\u4e0e\u64cd\u4f5c\u6280\u672f<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\u573a\u666f\uff0c\u53ef\u4ee5\u8fd0\u7528\u4e00\u4e9b\u9ad8\u7ea7\u7684\u9009\u62e9\u4e0e\u64cd\u4f5c\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
1. \u8fc7\u6ee4\u9009\u62e9\u5668<\/h4>\n<\/p>\n
\u5982\u9700\u9009\u62e9\u7b2c\u4e00\u4e2a\u6216\u6700\u540e\u4e00\u4e2a\u7279\u5b9a\u7c7b\u578b\u7684input\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528:first<\/code>\u6216:last<\/code>\u8fc7\u6ee4\u9009\u62e9\u5668\uff1a<\/p>\n<\/p>\n
var firstInputValue = $('input[type="text"]:first').val();<\/p>\n
var lastInputValue = $('input[type="text"]:last').val();<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8868\u5355\u5e8f\u5217\u5316<\/h4>\n<\/p>\n
\u5f53\u6d89\u53ca\u5230\u83b7\u53d6\u6574\u4e2a\u8868\u5355\u4e2d\u6240\u6709input\u7684\u503c\u65f6\uff0c.serialize()<\/code>\u65b9\u6cd5\u975e\u5e38\u6709\u7528\u3002\u5b83\u4f1a\u8fd4\u56de\u4e00\u4e2aURL\u7f16\u7801\u6587\u672c\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8eAJAX\u8bf7\u6c42\uff1a<\/p>\n<\/p>\n
var formData = $('form').serialize();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001JQUERY\u4e0eAJAX\u4ea4\u4e92<\/h3>\n<\/p>\n
\u5728web\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5c06input\u7684value\u901a\u8fc7AJAX\u53d1\u9001\u5230\u670d\u52a1\u5668\u3002<\/p>\n<\/p>\n
1. AJAX\u63d0\u4ea4\u8868\u5355\u503c<\/h4>\n<\/p>\n
\u4f7f\u7528jQuery\u53d1\u9001AJAX\u8bf7\u6c42\uff0c\u5728\u5904\u7406input\u503c\u65f6\u663e\u5f97\u5c24\u4e3a\u7b80\u5355\uff1a<\/p>\n<\/p>\n
$.ajax({<\/p>\n
    type: 'POST',<\/p>\n
    url: 'submit_form.php',<\/p>\n
    data: $('#myForm').serialize(),<\/p>\n
    success: function(response) {<\/p>\n
        \/\/ Handle response<\/p>\n
    }<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b64\u4ee3\u7801\u901a\u8fc7AJAX\u65b9\u6cd5\u53d1\u9001\u4e86id\u4e3amyForm<\/code>\u7684\u8868\u5355\u5185\u7684\u5e8f\u5217\u5316input\u503c\u3002<\/p>\n<\/p>\n
2. \u5b9e\u65f6\u68c0\u7d22\u8f93\u5165\u503c<\/h4>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u5728\u8f93\u5165\u5b57\u6bb5\u7684\u503c\u53d1\u751f\u53d8\u5316\u65f6\u7acb\u5373\u6267\u884c\u67d0\u4e9b\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
$('#inputId').on('input', function() {<\/p>\n
    var currentValue = $(this).val();<\/p>\n
    \/\/ Perform actions using the current input value<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u4f1a\u76d1\u542cid\u4e3ainputId<\/code>\u7684input\u5143\u7d20\u4e0a\u7684\u8f93\u5165\u4e8b\u4ef6\uff0c\u5e76\u5b9e\u65f6\u5904\u7406\u53d8\u5316\u7684\u503c\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u6700\u4f73\u5b9e\u8df5\u4e0e\u6027\u80fd\u63d0\u5347<\/h3>\n<\/p>\n
\u5f53\u5f00\u53d1\u5927\u578b\u5e94\u7528\u65f6\uff0c\u4f18\u5316\u9009\u62e9\u5668\u548c\u51cf\u5c11DOM\u64cd\u4f5c\u663e\u5f97\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n<\/p>\n
1. \u7f13\u5b58\u9009\u62e9\u5668<\/h4>\n<\/p>\n
\u5982\u679c\u4f60\u9700\u8981\u9891\u7e41\u5730\u83b7\u53d6\u540c\u4e00\u4e2ainput\u7684\u503c\uff0c\u5e94\u8003\u8651\u7f13\u5b58\u8be5\u9009\u62e9\u5668\u6765\u63d0\u5347\u6027\u80fd\uff1a<\/p>\n<\/p>\n
var $input = $('#inputId');<\/p>\n
$input.on('input', function() {<\/p>\n
    var inputValue = $input.val();<\/p>\n
    \/\/ Do something with the value<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u51cf\u5c11DOM\u8bbf\u95ee<\/h4>\n<\/p>\n
\u907f\u514d\u5728\u6bcf\u6b21\u64cd\u4f5c\u65f6\u90fd\u8bbf\u95eeDOM\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u5c40\u90e8\u53d8\u91cf\u4e2d\u7f13\u5b58values\u548celements\u6765\u51cf\u5c11\u8fd9\u79cd\u8bbf\u95ee\uff1a<\/p>\n<\/p>\n
var inputs = $(':input').map(function(){<\/p>\n
    return $(this).val();<\/p>\n
}).get();<\/p>\n
\/\/ Do something with the inputs array<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e9b\u65b9\u6cd5\u548c\u7b56\u7565\u63d0\u4f9b\u4e86\u5e7f\u6cdb\u7684\u6280\u672f\u6765\u6709\u6548\u5730\u4f7f\u7528jQuery\u83b7\u53d6\u548c\u5904\u7406input\u5143\u7d20\u7684\u503c\u3002\u65e0\u8bba\u4f60\u662f\u5728\u5904\u7406\u5355\u4e2ainput\u8fd8\u662f\u6574\u4e2a\u52a8\u6001\u8868\u5355\uff0cjQuery\u63d0\u4f9b\u7684\u7b80\u6d01API\u80fd\u8ba9\u4f60\u7684\u4efb\u52a1\u53d8\u5f97\u66f4\u52a0\u8f7b\u677e\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u95ee\u98981\uff1aJQ\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u4f7f\u7528JQ\u6765\u83b7\u53d6input\u7684value\u503c\uff1f<\/strong><\/p>\n
JQ\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684JavaScript\u5e93\uff0c\u7528\u4e8e\u64cd\u4f5c\u548c\u5904\u7406JSON\u6570\u636e\u3002\u5982\u679c\u8981\u4f7f\u7528JQ\u6765\u83b7\u53d6input\u7684value\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n
\u4e00\u3001\u5728HTML\u4e2d\u4e3ainput\u5143\u7d20\u8bbe\u7f6e\u4e00\u4e2a\u552f\u4e00\u7684ID\uff0c\u4f8b\u5982\uff1a<input type="text" id="myInput"><\/code>\u3002<\/p>\n
\u4e8c\u3001\u5728JavaScript\u4ee3\u7801\u4e2d\u5f15\u5165JQ\u5e93\uff0c\u5e76\u4f7f\u7528\u9009\u62e9\u5668\u9009\u62e9\u8be5input\u5143\u7d20\uff0c\u7136\u540e\u4f7f\u7528.val()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u5176value\u503c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
\/\/ \u83b7\u53d6input\u5143\u7d20\u7684value\u503c\nvar inputValue = $('#myInput').val();\n<\/code><\/pre>\n
\u95ee\u98982\uff1a\u9664\u4e86\u4f7f\u7528JQ\uff0c\u8fd8\u6709\u5176\u4ed6\u7684\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6input\u7684value\u503c\u5417\uff1f<\/strong><\/p>\n
\u662f\u7684\uff0c\u9664\u4e86\u4f7f\u7528JQ\uff0c\u8fd8\u6709\u5176\u4ed6\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6input\u7684value\u503c\u3002\u4ee5\u4e0b\u662f\u51e0\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n
    \n
  1. \u4f7f\u7528\u539f\u751fJavaScript\u7684getElementById()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6input\u5143\u7d20\uff0c\u7136\u540e\u4f7f\u7528.value<\/code>\u5c5e\u6027\u6765\u83b7\u53d6\u5176value\u503c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n
    \/\/ \u83b7\u53d6input\u5143\u7d20\u7684value\u503c\nvar inputValue = document.getElementById('myInput').value;\n<\/code><\/pre>\n
      \n
    1. \u4f7f\u7528\u539f\u751fJavaScript\u7684querySelector()<\/code>\u65b9\u6cd5\u6765\u9009\u62e9\u8be5input\u5143\u7d20\uff0c\u7136\u540e\u4f7f\u7528.value<\/code>\u5c5e\u6027\u6765\u83b7\u53d6\u5176value\u503c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n
      \/\/ \u83b7\u53d6input\u5143\u7d20\u7684value\u503c\nvar inputValue = document.querySelector('#myInput').value;\n<\/code><\/pre>\n
        \n
      1. \u4f7f\u7528\u539f\u751fJavaScript\u7684getElementsByClassName()<\/code>\u65b9\u6cd5\u6216getElementsByTagName()<\/code>\u65b9\u6cd5\u6765\u9009\u62e9\u8be5input\u5143\u7d20\uff0c\u7136\u540e\u4f7f\u7528.value<\/code>\u5c5e\u6027\u6765\u83b7\u53d6\u5176value\u503c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n
        \/\/ \u83b7\u53d6input\u5143\u7d20\u7684value\u503c\nvar inputValue = document.getElementsByClassName('myInput')[0].value;\n\/\/ \u6216\u8005\nvar inputValue = document.getElementsByTagName('input')[0].value;\n<\/code><\/pre>\n
        \u95ee\u98983\uff1aJQ\u7684.val()<\/code>\u65b9\u6cd5\u8fd8\u6709\u5176\u4ed6\u7528\u9014\u5417\uff1f\u9664\u4e86\u83b7\u53d6input\u7684value\u503c\u4e4b\u5916\u8fd8\u53ef\u4ee5\u7528\u6765\u505a\u4ec0\u4e48\uff1f<\/strong><\/p>\n
        \u662f\u7684\uff0cJQ\u7684.val()<\/code>\u65b9\u6cd5\u9664\u4e86\u7528\u4e8e\u83b7\u53d6input\u7684value\u503c\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8bbe\u7f6einput\u7684value\u503c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u4e3ainput\u5143\u7d20\u8bbe\u7f6e\u4e00\u4e2a\u65b0\u7684value\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
        \/\/ \u8bbe\u7f6e\u65b0\u7684input value\u503c\n$('#myInput').val('\u65b0\u7684value\u503c');\n<\/code><\/pre>\n
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