Javascript 如何将regexp与onKeyDown事件中的URL进行匹配
我正在使用此RegExp来匹配URLJavascript 如何将regexp与onKeyDown事件中的URL进行匹配,javascript,regex,events,keyboard,Javascript,Regex,Events,Keyboard,我正在使用此RegExp来匹配URL reMatchUrl = /(?:(?:https?|ftp):\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0
reMatchUrl = /(?:(?:https?|ftp):\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,}))\.?)(?::\d{2,5})?(?:[/?#]\S*)?/i
但是,在键入或复制/粘贴时,如何修改RegExp以匹配输入[type=textarea]
元素中的URL?(即来自onKeyUp事件)
挑战在于等待URL完成(检查尾随空格?),并正确处理包含URL的复制/粘贴块。但如果字符串以url结尾,则不会有尾随空格
例如:
// match only the url in the string,
// recognizing that the URL is complete
string = "hey, check this out http://www.something.com/this/is/cool?a=b"
found = string.match(reMatchUrl)
url = found && found[0]
// url = "http://www.something.com/this/is/cool?a=b"
// does NOT match the url in the string because the user
// has NOT finished typing
string = "hey, check this out http://www.something.com/this/is/coo"
found = string.match(reMatchUrl)
url = found && found[0]
// url = null
这在纯JS中有效:
<!DOCTYPE html>
<html>
<body>
<label for="url">set an url:</label>
<input type="text" id="url">
<br><br>
<div id="result"></div>
<script>
// regex string
var reMatchUrl = '(?:(?:https?|ftp):\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,}))\.?)(?::\d{2,5})?(?:[/?#]\S*)?';
// build regex matched
var regx = new RegExp(reMatchUrl, 'i');
// add event listener on input
document.getElementById('url').addEventListener("keyup", function (e) {
// get the text in the input
var input = document.getElementById('url').value;
// check for a match
var match = input.match(regx);
// update html
if (match) {
document.getElementById('result').innerHTML = 'valid';
} else {
document.getElementById('result').innerHTML = 'not valid';
}
});
</script>
</body>
</html>
设置url:
//正则表达式字符串
(3)以下:::(((:::::(:::::::以下以下几几几几?)?????)以下以下(((:::::(((::::((::::::(:::::::1010 10.10岁,127)127(((::::::::::((::::::(((:::::)))10((:10 10 10.12;127)127)127,(((((::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::1010 10 10;127)10;127)10;127)127)127)127)127(((((((((:::::::::d | 2[01]\d | 22[0-3])(?:\(?:1,2}2[0-4]\d | 25[0-5]){2(?:\(?:[1-9]\d | 1\d\d | 2[0-4]\d | 25[0-4]))(?:(?:(?:[a-z\u00a1-\uffff0-9]-)[a-z\u00a1-\uff09](?:\。(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\(?:[a-z\u00a1-\uffff]{2,5})(?:\d{2,5})(?:[/?}]\S*);
//构建正则表达式匹配
var regx=新的RegExp(reMatchUrl,'i');
//在输入上添加事件侦听器
document.getElementById('url')。addEventListener(“键控”,函数(e){
//获取输入中的文本
var input=document.getElementById('url')。值;
//检查是否匹配
var match=input.match(regx);
//更新html
如果(匹配){
document.getElementById('result')。innerHTML='valid';
}否则{
document.getElementById('result')。innerHTML='无效';
}
});
它会侦听输入上的按键事件,然后在输入值与正则表达式匹配时更新状态。因此,您希望将按键按下的键记录到一个字符串中,然后在该字符串完成后,您希望与之匹配?前面的文本是什么?您需要将其作为本机javascript吗?抱歉,我不清楚。我知道要使用JS事件,我需要的是一个RegExp,它可以丢弃额外的文本并识别键入的URL字符串的结尾。这是真的,但它侦听输入而不是URL。问题不清楚,但我不明白为什么有人希望在键入location.href时侦听它。我希望在键入输入[type=textarea]时侦听输入。