jQuery val()indexOf不起作用 [英] jQuery val() indexOf not working

问题描述

如果输入值包含某个单词，则尝试执行某些操作，但这不起作用:

Trying to do something if the input value contains a certain word but this doesn't work:

   var formMain =  $('#MainForm :input[name="Search"]');
    if ((formMain).value.indexOf('word') >= 0) {
    alert('HAS THIS WORD IN IT!');

示例表格:

<form onsubmit="return OnSubmitSearchForm(event, this);" action="/searchresults.asp" id="MainForm" name="MainForm" method="post" class="search_results_section">
            <input type="hidden" value="word" name="Search">
            <input type="hidden" value="" name="Cat">
</form>

推荐答案

您的标题中提到了val()，但实际上并没有使用它. formMain是一个jquery对象，没有value，您应该使用val().

Your title mentions val() but you're not actually using it. formMain is a jquery object and has no value, you should use val().

var formMain =  $('#MainForm :input[name="Search"]');
if (formMain.val().indexOf('word') >= 0) {
    alert('HAS THIS WORD IN IT!');
}

还要注意，formMain是一个误导变量名，因为它不是主要形式，而是包含搜索输入的jquery对象.

Also note that formMain is a misleading variable name as it is not the main form but rather a jquery object which contains the search input.

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