检测鼠标光标类型

发布于 2024-10-21 19:28:54 字数 131 浏览 3 评论 0原文

我想要 JavaScript 代码来检测鼠标光标类型。

例如,当光标悬停在

我将如何检测这个?

I want JavaScript code to detect the mouse cursor type.

For example when the cursor hovers in <textarea> it changes from default to text.

How would I go about detecting this?

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撩发小公举 2024-10-28 19:28:54

您可以这样做,但它并不漂亮,而且可能会很慢,具体取决于页面上有多少元素。

$('*').mouseenter(function(){
    var currentCursor = $(this).css('cursor') ;

    //do what you want here, i.e.
    console.log( currentCursor );
});

You could do this, but its not pretty, and will probably be quite slow depending on how many elements you have on your page.

$('*').mouseenter(function(){
    var currentCursor = $(this).css('cursor') ;

    //do what you want here, i.e.
    console.log( currentCursor );
});
|煩躁 2024-10-28 19:28:54

来检测光标类型

您可以使用JavaScript

<input id="sample_text" name="one" type="text" value="Sample Text" />

,JavaScript 代码应该如下所示,

$('input[id=sample_text]').click( function() {
   alert("test");   
   var ctl = document.getElementById('sample_text');
   var startPos = ctl.selectionStart;
   var endPos = ctl.selectionEnd;
   alert(startPos + ", " + endPos);
});

您也可以查看此 Jsfiddle for Js 光标检测

上面是编写的 Jquery 代码,您也可以使用 Vanilla JS,只需将其更改为

<input id="sample_text" name="one" type="text" value="Sample Text" onclick="detect_cursor()" />

JavaScript 应该如下所示

function detect_cursor() {
   alert("test");   
   var ctl = document.getElementById('sample_text');
   var startPos = ctl.selectionStart;
   var endPos = ctl.selectionEnd;
   alert(startPos + ", " + endPos);
};

You can detect the cursor type using JavaScript

like

<input id="sample_text" name="one" type="text" value="Sample Text" />

and the JavaScript code should look something like this

$('input[id=sample_text]').click( function() {
   alert("test");   
   var ctl = document.getElementById('sample_text');
   var startPos = ctl.selectionStart;
   var endPos = ctl.selectionEnd;
   alert(startPos + ", " + endPos);
});

you can also look at this Jsfiddle for Js Cursor Detection

the above is the Jquery code written , you can also use the Vanilla JS for that you just need to change it to

<input id="sample_text" name="one" type="text" value="Sample Text" onclick="detect_cursor()" />

and the JavaScript should look something like this

function detect_cursor() {
   alert("test");   
   var ctl = document.getElementById('sample_text');
   var startPos = ctl.selectionStart;
   var endPos = ctl.selectionEnd;
   alert(startPos + ", " + endPos);
};
滿滿的愛 2024-10-28 19:28:54

我有一个很好的 jQuery 扩展,非常适合这种类型的事情,要点如下:

https://gist.github.com/2206057

要使用它,只需执行以下操作:

$("#eleID").cursor(); // will return current cursor state for that element
$("#eleID").cursor("pointer"); // will change ele cursor to whatever is ""
$("#eleID").cursor("clear"); // will change ele cursor to default
$("#eleID").cursor("ishover"); // will return boolean of if mouse is over element or not
$("#eleID").cursor("position"); // will return cursor's current position in "relation" to element

$.cursor("wait") // will change document cursor to whatever is ""
$.cursor($("#eleID"), "wait"); // same as $("#eleID").cursor("wait");
$.cursor("position") // will return current cursor position

应该提及,如果您为“position”和“isHover”提交多个元素,例如 $("#eleID1, .elementsWiththisClass") ,那么它将返回一个包含以下对象的 Array

var poses = $("#eleID1, .elementsWiththisClass").cursor("position") //  will equal
poses[0] = {
    ele: e.fn.e.init[1], // the jquery element
    x: XXX, //  where XXX is the cursors current position in relation to element
    y: XXX
}
poses[1] = { // ...and so on and so forth for each element

I have a nice jQuery Extension perfect for this type of thing at this gist:

https://gist.github.com/2206057

To use it just do something like:

$("#eleID").cursor(); // will return current cursor state for that element
$("#eleID").cursor("pointer"); // will change ele cursor to whatever is ""
$("#eleID").cursor("clear"); // will change ele cursor to default
$("#eleID").cursor("ishover"); // will return boolean of if mouse is over element or not
$("#eleID").cursor("position"); // will return cursor's current position in "relation" to element

also

$.cursor("wait") // will change document cursor to whatever is ""
$.cursor($("#eleID"), "wait"); // same as $("#eleID").cursor("wait");
$.cursor("position") // will return current cursor position

should also mention, if you submit multiple elements like $("#eleID1, .elementsWiththisClass") for "position" and "isHover" then it will return an Array containing objects like:

var poses = $("#eleID1, .elementsWiththisClass").cursor("position") //  will equal
poses[0] = {
    ele: e.fn.e.init[1], // the jquery element
    x: XXX, //  where XXX is the cursors current position in relation to element
    y: XXX
}
poses[1] = { // ...and so on and so forth for each element
残月升风 2024-10-28 19:28:54

正如此处所建议的,使用getCompulatedStyle对我有用。

const onMouseOver = function (e) {
      var cursor = getComputedStyle(e.target).cursor;
      console.log({ cursor });
    };
document.addEventListener("mouseover", onMouseOver, false);

虽然当光标设置为 auto 时,这无助于检测确切的光标类型,但我们至少可以在光标设置为 auto 以外的其他值时使用它。

As suggested here, using getComputedStyle worked for me.

const onMouseOver = function (e) {
      var cursor = getComputedStyle(e.target).cursor;
      console.log({ cursor });
    };
document.addEventListener("mouseover", onMouseOver, false);

Although this does not help detect the exact cursor type when cursor is set to auto, we can at least use it when cursor is set to something other than auto.

疯到世界奔溃 2024-10-28 19:28:54

我认为您可以读取 cursor css 属性,就像您可以设置它一样,但是您必须从特定元素执行此操作,因为据我所知,无法从窗口或文档对象中读取光标类型。按照这个逻辑,要获取当前光标类型,您必须找到鼠标所在的当前元素并读取其 cursor css。但是,您必须不断检查光标是否发生变化,这很慢并且容易出错(通常,您应该总是尝试将代码放入事件处理程序中以对某些内容做出反应,而不是不断检查是否发生变化它已经发生了,将你的代码放入该函数中会更逻辑、更高效、更健壮、更清晰。)

但是检测光标类型的想法仍然让我着迷,如果有人知道我很想听听它。 :D


作为替代解决方案,您为什么不直接设置一个事件处理程序,以便在它进入会更改它的元素时,而不是读取光标类型?这会更不容易出错,而且可能更直接,因为我认为您不太关心光标,但如果鼠标已进入特定元素。

$("#textbox").mouseover( function() { 
    //I know the cursor has changed because it is now in a textbox
});

I think you can read the cursor css property just like you can set it, but you have to do this from a specific element because AFAIK there's no way to just read the cursor type from the window or document object. Following this logic, to get the current cursor type you would have to find the current element the mouse is over and read its cursor css. However, you'd constantly have to check to see if the cursor changed, which is slow and error prone (As a rule you should almost always try to try to put your code in an event handler to react to something instead of constantly checking if its happened yet and putting your code in that function its more logical, efficient, robust, and clear.)

But the idea of detecting the cursor type still fascinates me, and if anyone knows how I'd love to hear about it. :D


As an alternate solution, rather than reading the cursor type, why don't you just set an event handler for when it enters an element that would change it? This would be a lot less error prone and probably more direct, because I don't think you care so much about the cursor, but if the mouse has entered a specific element.

$("#textbox").mouseover( function() { 
    //I know the cursor has changed because it is now in a textbox
});
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