String search into html_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-03-24 10:11 出处：网络

I\'m trying to find some text in a long string but my code does not work, For Example: Var result = “<!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional/开发者_如何学C/EN html><head<

I'm trying to find some text in a long string but my code does not work, For Example:

Var result = “<!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional/开发者_如何学C/EN html><head<title>Hey i am here</title>”

if (result.search('Hey i am here')== true) {
alert('found');
} else { alert('NOT found'); }

But This dont Works :( Please help

var is lower case
Strings can be delimited with " or ' but not with “, don't use curly quotes.
The search method expects a regular expression (although it will try to convert a string if it gets one)
If you want a simple string match, then indexOf is more efficient then search.
Both search and indexOf return the index of the first match (or -1 if it doesn't find one), not a boolean.

As an aside, that Doctype will trigger quirks mode, so never use it in a real HTML document.

var result = "<!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN html><head<title>Hey i am here</title>"

if (result.indexOf("Hey i am here") >= 0) {
    alert('found');
} else { 
    alert('NOT found'); 
}

I thinks you need to use an .indexOf function.

so your if statement would be

if (results.indexOf('Hey i am here') != -1) {
   alert('found');
} else { alert('NOT found'); }

There are a lot of ways to do this: See here

Search method returns the position of the match, or -1 if no match is found. Not true or false.

String search into html

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