Use JavaScript to place cursor at end of text in text input element - Stack Overflow

admin管理员组

文章数量:1125965

What is the best way (and I presume simplest way) to place the cursor at the end of the text in a input text element via JavaScript - after focus has been set to the element?

What is the best way (and I presume simplest way) to place the cursor at the end of the text in a input text element via JavaScript - after focus has been set to the element?

• javascript

Share Improve this question Follow asked Feb 4, 2009 at 12:11 PeanutPeanut 19.4k2020 gold badges7474 silver badges7878 bronze badges

Add a comment  | 

37 Answers 37

Sorted by: Reset to default 1 2 Next 266

There's a simple way to get it working in most browsers.

this.selectionStart = this.selectionEnd = this.value.length;

However, due to the *quirks of a few browsers, a more inclusive answer looks more like this

setTimeout(function(){ that.selectionStart = that.selectionEnd = 10000; }, 0);

Using jQuery (to set the listener, but it's not necessary otherwise)

$('#el').focus(function(){
  var that = this;
  setTimeout(function(){ that.selectionStart = that.selectionEnd = 10000; }, 0);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id='el' type='text' value='put cursor at end'>

Using Vanilla JS (borrowing addEvent function from this answer)

// Basic cross browser addEvent
function addEvent(elem, event, fn){
if(elem.addEventListener){
  elem.addEventListener(event, fn, false);
}else{
  elem.attachEvent("on" + event,
  function(){ return(fn.call(elem, window.event)); });
}}
var element = document.getElementById('el');

addEvent(element,'focus',function(){
  var that = this;
  setTimeout(function(){ that.selectionStart = that.selectionEnd = 10000; }, 0);
});

<input id='el' type='text' value='put cursor at end'>

---

Quirks

Chrome has an odd quirk where the focus event fires before the cursor is moved into the field; which screws my simple solution up. Two options to fix this:

1. You can add a timeout of 0 ms (to defer the operation until the stack is clear)
2. You can change the event from focus to mouseup. This would be pretty annoying for the user unless you still kept track of focus. I'm not really in love with either of these options.

Also, @vladkras pointed out that some older versions of Opera incorrectly calculate the length when it has spaces. For this you can use a huge number that should be larger than your string.

Try this, it has worked for me:

//input is the input element

input.focus(); //sets focus to element
var val = this.input.value; //store the value of the element
this.input.value = ''; //clear the value of the element
this.input.value = val; //set that value back.  

For the cursor to be move to the end, the input has to have focus first, then when the value is changed it will goto the end. If you set .value to the same, it won't change in chrome.

I faced this same issue (after setting focus through RJS/prototype) in IE. Firefox was already leaving the cursor at the end when there is already a value for the field. IE was forcing the cursor to the beginning of the text.

The solution I arrived at is as follows:

<input id="search" type="text" value="mycurrtext" size="30" 
       onfocus="this.value = this.value;" name="search"/>

This works in both IE7 and FF3 but doesn't work in modern browsers (see comments) as it is not specified that UA must overwrite the value in this case (edited in accordance with meta policy).

After hacking around with this a bit, I found the best way was to use the setSelectionRange function if the browser supports it; if not, revert to using the method in Mike Berrow's answer (i.e. replace the value with itself).

I'm also setting scrollTop to a high value in case we're in a vertically-scrollable textarea. (Using an arbitrary high value seems more reliable than $(this).height() in Firefox and Chrome.)

I've made it is as a jQuery plugin. (If you're not using jQuery I trust you can still get the gist easily enough.)

I've tested in IE6, IE7, IE8, Firefox 3.5.5, Google Chrome 3.0, Safari 4.0.4, Opera 10.00.

It's available on jquery.com as the PutCursorAtEnd plugin. For your convenience, the code for release 1.0 is as follows:

// jQuery plugin: PutCursorAtEnd 1.0
// http://plugins.jquery.com/project/PutCursorAtEnd
// by teedyay
//
// Puts the cursor at the end of a textbox/ textarea

// codesnippet: 691e18b1-f4f9-41b4-8fe8-bc8ee51b48d4
(function($)
{
    jQuery.fn.putCursorAtEnd = function()
    {
    return this.each(function()
    {
        $(this).focus()

        // If this function exists...
        if (this.setSelectionRange)
        {
        // ... then use it
        // (Doesn't work in IE)

        // Double the length because Opera is inconsistent about whether a carriage return is one character or two. Sigh.
        var len = $(this).val().length * 2;
        this.setSelectionRange(len, len);
        }
        else
        {
        // ... otherwise replace the contents with itself
        // (Doesn't work in Google Chrome)
        $(this).val($(this).val());
        }

        // Scroll to the bottom, in case we're in a tall textarea
        // (Necessary for Firefox and Google Chrome)
        this.scrollTop = 999999;
    });
    };
})(jQuery);

el.setSelectionRange(-1, -1);

https://codesandbox.io/s/peaceful-bash-x2mti

This method updates the HTMLInputElement.selectionStart, selectionEnd, and selectionDirection properties in one call.

https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/setSelectionRange

In other js methods -1 usually means (to the) last character. This is the case for this one too, but I couldn't find explicit mention of this behavior in the docs.

<script type="text/javascript">  
    function SetEnd(txt) {  
      if (txt.createTextRange) {  
       //IE  
       var FieldRange = txt.createTextRange();  
       FieldRange.moveStart('character', txt.value.length);  
       FieldRange.collapse();  
       FieldRange.select();  
       }  
      else {  
       //Firefox and Opera  
       txt.focus();  
       var length = txt.value.length;  
       txt.setSelectionRange(length, length);  
      }  
    }   
</script>  

This function works for me in IE9, Firefox 6.x, and Opera 11.x

It's 2019 and none of the methods above worked for me, but this one did, taken from https://css-tricks.com/snippets/javascript/move-cursor-to-end-of-input/

function moveCursorToEnd(id) {
  var el = document.getElementById(id) 
  el.focus()
  if (typeof el.selectionStart == "number") {
      el.selectionStart = el.selectionEnd = el.value.length;
  } else if (typeof el.createTextRange != "undefined") {           
      var range = el.createTextRange();
      range.collapse(false);
      range.select();
  }
}

<input id="myinput" type="text" />
<a href="#" onclick="moveCursorToEnd('myinput')">Move cursor to end</a>

I've tried the following with quite great success in chrome

$("input.focus").focus(function () {
    var val = this.value,
        $this = $(this);
    $this.val("");

    setTimeout(function () {
        $this.val(val);
    }, 1);
});

Quick rundown:

It takes every input field with the class focus on it, then stores the old value of the input field in a variable, afterwards it applies the empty string to the input field.

Then it waits 1 milisecond and puts in the old value again.

const end = input.value.length
input.setSelectionRange(end, end)
// 

                本文标签：
                Use JavaScript to place cursor at end of text in text input elementStack Overflow

                        版权声明：本文标题：Use JavaScript to place cursor at end of text in text input element - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人，
                        转载请联系作者并注明出处：http://www.betaflare.com/web/1736675461a1947159.html，
                        本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。