jQuery .focus() is highlighting all pre-filled text

问题

HTML

<input id="formloginusername" type="text" name="username" placeholder="Username" value="Pre-filled-from-database"></input>

JS:

$(document).ready(function() {
    $("#formloginusername").focus();
});

Problem:

The text "Pre-filled-from-database" is highlighted. I only want the cursor to show in the field as if the user had clicked it after the filled text.

Thanks!

回答1:

Here's a nifty little trick...

$(document).ready(function() {
    var $field = $("#formloginusername"),
        oldVal = $field.val();
    $field.focus().val('').val(oldVal);
});

DEMO: http://jsfiddle.net/X7Y8S/

回答2:

Just this will do:

$('#field').focus().val($("#field").val());

回答3:

Hopstream, what I found in Chrome using your method is the cursor ended up at the end of the text. I needed a way to get the cursor focused on the start of the field without highlighting the text. This worked for me:

$('#ElementID').each(function () { $(this).focus(); this.selectionEnd = this.selectionStart; });

来源：https://stackoverflow.com/questions/13371430/jquery-focus-is-highlighting-all-pre-filled-text