CODEWITHSUNDEEP
javascripthtmlcross-browser
Laoujin
Laoujin

Reputation: 10249

Set caret to end of textbox on focus

The Question:

When a certain textbox receives focus, set the caret to the end of the textbox. The solution needs to work with IE7, Opera, Chrome and Firefox.
To make things a bit easier, this behavior is only needed when the current value of the textbox is a fixed value. (Say 'INIT')

Incomplete Solutions:

One would expect this to be pretty simple but I couldn't find an answer on SO that works on all browsers. The following answers do NOT work:

$("#test").focus(function() {
  // This works for Opera only
  // Also tested with $(this).val($(this).val());
  if (this.value == "INIT") {
    this.value = "";
    this.value = "INIT";
  }
});

$("#test").focus(function() {
  // This works for IE and for Opera
  if (this.value == "INIT") {
    setCaretPosition(this, 4);
  }
});

I got the setCaretPosition function from SO questions and saw it on different blogs aswell:

function setCaretPosition(ctrl, pos) {
        if (ctrl.setSelectionRange) {
            //ctrl.focus(); // can't focus since we call this from focus()
            // IE only
            ctrl.setSelectionRange(pos, pos);
        }
        else if (ctrl.createTextRange) {
            // Chrome, FF and Opera
            var range = ctrl.createTextRange();
            range.collapse(true);
            range.moveEnd('character', pos);   // Also tested with this
            range.moveStart('character', pos); // and this line in comment
            range.select();
        }
}

Fiddle

I've setup a jsFiddle.

Upvotes: 4

Views: 2377

Answers (3)

Per Salbark
Per Salbark

Reputation: 3645

I found a jQuery plugin that's been working for me for a long time. Can't remember where though.

(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);

Upvotes: 0

Esailija
Esailija

Reputation: 140236

Try this:

$("input").on("focus", function() {
    if (this.value === "INIT") {
        var input = this;
        setTimeout(function() {
            if (input.createTextRange) {
                var r = input.createTextRange();
                r.collapse(true);
                r.moveEnd("character", input.value.length);
                r.moveStart("character", input.value.length);
                r.select();
            }
            else {
                input.selectionStart = input.selectionEnd = input.value.length;
            }

        }, 13);
    }
});

http://jsfiddle.net/azBxU/4/

Upvotes: 4

surj
surj

Reputation: 4913

This should work:

$("#test").focus(function() {
    var $this = $(this);
    var value = $this.val();
    if (value === "INIT") {
        setTimeout(function() {
            $this.val(value);
        }, 0);
    }
});

Upvotes: 0

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