Javascript substr（）;按字数限制而不是字符 [英] Javascript substr(); limit by word not char

问题描述

我想用字而不是字符来限制子字符串。我正在考虑正则表达式和空格但不知道如何将它拉下来。

I would like to limit the substr by words and not chars. I am thinking regular expression and spaces but don't know how to pull it off.

场景：使用javascript / jQuery将一段单词限制为200个单词。

Scenario: Limit a paragraph of words to 200 words using javascript/jQuery.

var $postBody = $postBody.substr(' ',200); 

这很棒，但将文字分成两半:)提前感谢！

This is great but splits words in half :) Thanks ahead of time!

推荐答案

function trim_words(theString, numWords) {
    expString = theString.split(/\s+/,numWords);
    theNewString=expString.join(" ");
    return theNewString;
}

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