如何使用JQuery在JavaScript中计算单词 [英] How to count words in JavaScript using JQuery

问题描述

我有一个简单的html文本框。当我提交文本框所在的表单时，我想使用Jquery获取一个带有单词数量的变量。我还想检查输入的文本是否只是字母，数字和连字符（也在jquery中）。在提交表单时，我不需要像用户输入那样计算单词。如果关闭jquery，表单将不会提交，所以我猜不使用php没有安全风险。这是真的吗？

I have a simple html text box. When I "submit" the form that the text box is in, I would like to get a variable with the number of words inside using Jquery. I would also like to check if the inputted text is only letters, numbers and hyphens (also in jquery). I do not need to count the words as the user types, just when the form is submitted. The form won't submit if jquery is turned off so I guess there are no security risks by not using php. Is this true?

HTML：

<input type='text' name='name' id='name' />
<input type='button' value='Sign Up' id='signUp'>

JQUERY（尝试）：

JQUERY (attempt):

var wordcount = $('#name').val()  // i don't know how to count the words 

推荐答案

您可以拆分字符串，然后计算结果数组的长度。

You would split the string and then count the length of the resulting array.

$('input[type="submit"]').click( function() {
    var words = $('#name').val().split(' ');
    alert(words.length);
});

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