表单提交上的jQuery textarea字数

I have been looking around for a function that counts the number of words in a textarea when I click the form submit button.

当我点击表单提交按钮时,我一直在寻找一个计算textarea中单词数量的函数。

I am trying to display a message to the user that if they click submit and have only entered 50 or less words. This will be a confirm message basically saying "You have entered less than 50 words, are you sure you would like to continue?"...or something.

我试图向用户显示一条消息,如果他们点击提交并且只输入了50个或更少的单词。这将是一条确认消息,主要是说“你输入的字数少于50个,你确定要继续吗?”......或者别的什么。

Cheers

4 个解决方案

#1

HTML:

<form id="confirmForm">
    <textarea id="moreThan50"></textarea>
    <button type="submit">Submit</button>
</form>​

JS:

$('#confirmForm').submit(function(ev){
    var wordCount = $('#moreThan50').val().split(/\s/g).length;

    if (wordCount < 50) {
        if (!confirm('Less than 50 words, are you sure you want to submit?')) {
            ev.preventDefault();
        }
    }
});​

See demo

#2

You should use split method using a space as a splitter, and then you take the length of the array.

您应该使用空格作为拆分器的拆分方法,然后获取数组的长度。

var wordCount = $('textarea').val().split(' ').length

#3

Another method, you can use regex and count 'words' using \b:

另一种方法,你可以使用正则表达式并使用\ b计算'单词':

var words = $('#textareaid').val().match(/\b(\w+)\b)/g).length;

Ninja-Edit Oops, should have been .val not .text

Ninja-Edit Oops应该是.val not .text

#4

You can split at word boundaries using regular expressions..

您可以使用正则表达式在单词边界处拆分。

$('form').submit(function(){
   var words = $('textarea', this).val().split(/\b\W/);
   if (words.length < 50){
     // propmpt here.. and allow or cancel the submit..
   }
});