我想通过JavaScript跟踪表单中输入的更改。我的意图是（但不限于）
想法？
解决方案遍历所有输入元素，并在每个元素上放置 onchange 处理程序。当发生火灾时，请设置一个标志，让您知道表单已更改。一个基本的版本可以非常容易地设置，但是不会很聪明地认识到某人是否将输入从a改为b，然后回到a。如果发现这种情况很重要，那么它仍然是可能的，但需要做更多的工作。
以下是jQuery中的一个基本示例：
$（＃myForm） .on（change，：input，function（）{ //当某些东西发生变化时，可以做任何你需要做的事情 //在窗口中设置一个onExit函数 $（'＃saveButton'）。show（）; } ）;
I'd like to track changes in inputs in a form via javascript. My intent is (but not limited) to
- enable "save" button only when something has changed
- alert if the user wants to close the page and something is not saved
Ideas?
解决方案Loop through all the input elements, and put an onchange handler on each. When that fires, set a flag which lets you know the form has changed. A basic version of that would be very easy to set up, but wouldn't be smart enough to recognize if someone changed an input from "a" to "b" and then back to "a". If it were important to catch that case, then it'd still be possible, but would take a bit more work.
Here's a basic example in jQuery:
$("#myForm") .on("change", ":input", function() { // do whatever you need to do when something's changed. // perhaps set up an onExit function on the window $('#saveButton').show(); }) ;
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通过JavaScript跟踪表单中的更改的最佳方式是什么？
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