如何使用javascript检查字符串包含www prepend与http：// [英] how to check a string contains www prepend with http:// using javascript

问题描述

..在一个要求中，我有一个html输入文字，要求用户输入网址...这里的用户可以输入他的网址，如 http://www.domain.com 那很好..但是如果用户只输入 domain.com ....会发生什么？这里我的代码需要为给定的文本添加 http：// www 在html输入...所以我只是想检查输入文本中的网址是否包含 http：// www ...如果没有...？我的代码需要添加这个原型（ http：// wwww ）...任何建议或建议.....我非常乐意休息.......... .. :) ... :)：...）

..In a requirement i have a html input text for asking the user to enter url...what the thing here is user may enter his url with like http://www.domain.com that's fine..but what happens if user just enters domain.com....?here my code need to add http://www for the given text in html input...so i just want to check whether an url in input text contains http://www or not...if no...? my code need's to add this prototype(http://wwww)...any suggestions or advices.....i am very much happy to fallow............:)...:)...:)

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