How do you get the length of a string?

问题

How do you get the length of a string in jQuery?

回答1:

You don't need jquery, just use yourstring.length. See reference here and also here.

Update:

To support unicode strings, length need to be computed as following:

[..."𠮷"].length

or create an auxiliary function

function uniLen(s) {
    return [...s].length
}

回答2:

The easiest way:

$('#selector').val().length

回答3:

jQuery is a JavaScript library.

You don't need to use jQuery to get the length of a string because it is a basic JavaScript string object property.

somestring.length;

回答4:

HTML

<div class="selector">Text mates</div>

SCRIPT

alert(jQuery('.selector').text().length);

RESULT

回答5:

You don't need to use jquery.

var myString = 'abc';
var n = myString.length;

n will be 3.

回答6:

A somewhat important distinction is if the element is an input or not. If an input you can use:

$('#selector').val().length;

otherwise if the element is a different html element like a paragraph or list item div etc, you must use

$('#selector').text().length;

回答7:

It's not jquery you need, it's JS:

alert(str.length);

回答8:

same way you do it in javascript:

"something".length

回答9:

In jQuery :

var len = jQuery('.selector').val().length; //or 
( var len = $('.selector').val().length;) //- If Element is Text Box

var len = jQuery('.selector').html().length; //or
( var len = $('.selector').html().length; ) //- If Element is not Input Text Box

In JS :

var len = str.len;

回答10:

In some cases String.length might return a value which is different from the actual number of characters visible on the screen (e.g. some emojis are encoded by 2 UTF-16 units):

MDN says: This property returns the number of code units in the string. UTF-16, the string format used by JavaScript, uses a single 16-bit code unit to represent the most common characters, but needs to use two code units for less commonly-used characters, so it's possible for the value returned by length to not match the actual number of characters in the string.

来源：https://stackoverflow.com/questions/1044105/how-do-you-get-the-length-of-a-string

标签

javascript

jquery

string-length