blocks|key|1604161|text|在重新格式化代码以提高可读性后，您似乎缺少了结束右大括号}，这是这个问题中的拼写错误，还是代码中的错误？|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1604162|此外，您的第二个条件缺少右括号)。当你在你测试的浏览器中打开控制台时，你注意到javascript错误了吗？|1604163|一旦你解决了这个问题，你需要意识到你使用的是本机浏览器函数。当您使用querySelectorAll时，您会得到一个对象数组。对它们调用.value也可能会导致javascript错误。您需要遍历每个值，或者使用jQuery+(这可以为您提供更易维护的解决方案)。|1604164|使用jQuery，这将为您提供所需的结果：|1604165|if+(standardFlag+==+"ASCE")
{
++var+error+=+false;
++$.each(["Ss_param",+"S1_param",+"T0_param",+"TL_param"],+function(){
++++if+($("#"+%2B+this).val()+==+""){
++++++error+=+true;
++++++alert("Please+fill+out+all+the+required+fields+before+generating+your+design+spectrum");
++++}
++})

++if(!error+&&+$("Ss_param").val()+<+$("#S1_param").val())
++++alert("S1+must+be+less+than+Ss!");
++}
}|code-block|syntax|javascript|1604166|entityMap^0|S|1|0|F|1|0|Y|G|1W|6|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|13|8|@]|D|@]|E|$]]|$1|L|3|M|5|N|7|14|8|@]|D|@]|E|$O|P]]|$1|Q|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|R|$]]

After reformatting your code to be more readable, it appears you're missing an ending close brace <code>}</code>, is this a typo in this question, or an error in your code?

Additionally your second condition is missing a closing parenthesis <code>)</code>. Did you notice javascript errors when you open up the console in the browser you're testing on?

Once you solve that problem, you need to be aware that you're using native browser functions. When you use <code>querySelectorAll</code> you get an array of objects back. Calling <code>.value</code> on them will probably also be causing a javascript error. You need to loop through each value, or use jQuery (which will arguably give you a more maintainable solution).

Using jQuery, this will give you the desired result:

<pre><code>if (standardFlag == "ASCE")
{
 var error = false;
 $.each(["Ss_param", "S1_param", "T0_param", "TL_param"], function(){
 if ($("#" + this).val() == ""){
 error = true;
 alert("Please fill out all the required fields before generating your design spectrum");
 }
 })

 if(!error &amp;&amp; $("Ss_param").val() &lt; $("#S1_param").val())
 alert("S1 must be less than Ss!");
 }
}
</code></pre>

blocks|key|1560727|text|如果你的id总是以_param结尾，你可以使用过滤器|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1560728|if+($('[id$="_param"]').filter(function(){
+++++return+$(this).val()+===+"";++
+++}).length+>+0){
alert("Please+fill+out+all+the+required+fields+before+generating+your+design+spectrum");
}|code-block|syntax|javascript|1560729|entityMap^0|9|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can use filter if your id's always end's with <code>_param</code>

<pre><code>if ($('[id$="_param"]').filter(function(){
 return $(this).val() === ""; 
 }).length &gt; 0){
alert("Please fill out all the required fields before generating your design spectrum");
}
</code></pre>

blocks|key|1560773|text|不能从多个元素中获取一个值。一次只比较一个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1560774|if+(document.getElementById('Ss_param').value+===+""
++++%7C%7C+document.getElementById('S1_param').value+===+""
++++%7C%7C+document.getElementById('T0_param').value+===+""
++++%7C%7C+document.getElementById('TL_param').value+===+""+){|code-block|syntax|javascript|1560775|(并检查JavaScript控制台中的语法错误。您的else+if测试缺少右括号。)|offset|length|style|CODE|1560776|entityMap^0|0|0|Q|7|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You can't get one value from multiple elements. Just compare them one at a time:

<pre><code>if (document.getElementById('Ss_param').value === ""
 || document.getElementById('S1_param').value === ""
 || document.getElementById('T0_param').value === ""
 || document.getElementById('TL_param').value === "" ){
</code></pre>

(And check your JavaScript console for syntax errors. Your <code>else if</code> test is lacking a closing parenthesis.)

blocks|key|1560819|text|首先也是最重要的:您应该只查看验证库。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1560820|如果您仍然希望这样做，我可以研究一下jQuery的filter方法。|CODE|1560821|这将只返回具有值的元素：|1560822|var+$elementsWithValue+=+$('#Ss_param,+#S1_param,+#T0_param,+#TL_param').filter(function(){+
++++return+this.value.length+>+0+
});|code-block|syntax|javascript|1560823|然后，您可以只检查$elementsWithValue长度。|1560824|entityMap^0|0|J|0|P|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|Z|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|10|8|@]|D|@]|E|$N|O]]|$1|P|3|Q|5|6|7|11|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|S|$]]

First and foremost: You should just look into a validation library.

If you'd like to still approach it this way, I'd look into jQuery's <code>filter</code> method.

This would return only elements that have a value:

<pre><code>var $elementsWithValue = $('#Ss_param, #S1_param, #T0_param, #TL_param').filter(function(){ 
 return this.value.length &gt; 0 
});
</code></pre>

Then you can just check $elementsWithValue length.

<pre><code>if (standardFlag == "ASCE")
{
 if (document.querySelectorAll('#Ss_param, #S1_param, #T0_param, #TL_param').value == "" ){
 alert("Please fill out all the required fields before generating your design spectrum");
 }
 else if (document.getElementById('Ss_param').value &lt; document.getElementById('S1_param').value {
 alert("S1 must be less than Ss!");
 }
</code></pre>

I'm trying to check whether either Ss_param, S1_param, T0_param or TL_param input ids hold any value. The second condition passes its own case which is how I know that the entire conditional is not faulty, but the first condition doesn't pass when it should. How do I rectify this?

How do I check the values of multiple elements (described by their IDs) using JQuery?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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if (standardFlag == "ASCE"){  if (document.querySelectorAll('#Ss_param, #S1_param, #T0_param, #TL_param').value == "" ){    alert("Please fill out all the requi...

问如何使用JQuery检查多个元素(由其ID描述)的值？
EN

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问如何使用JQuery检查多个元素(由其ID描述)的值？EN