How To Check If A String Is An Anchor Tag?

Whats the best way to check if a string is an anchor tag in JS? Some examples: Link //returns true //returns false Is the

Solution 1:

You can use Regex for this:

functionisAnchor(str){
    return/^\<a.*\>.*\<\/a\>/i.test(str);
}

Demo

var testStrings = [
    '<a href="./page">Hello</a>',           // true'<a>Hi</a>',                            // true'<a href=\'test.php\'>Yo</a>',          // true'<A HREF=\'test.php\'>UPPERCASE</A>',   // true  - not case-sensitive'test',                                 // false'<a href="./page">Hello',               // false - tag not closed'<span>Hi again</span>'// false
];

for(var i=0; i<testStrings.length; i++){
    var str = testStrings[i];
    document.body.innerHTML += str + ' => ' + isAnchor(str) + '<br>';
}

functionisAnchor(str){
    return/^\<a.*\>.*\<\/a\>/i.test(str);
}

Solution 2:

Maybe this will point you in the right direction:

var stringOne = "<a href='./page'>Link</a>";
var stringTwo = "<a href='./page'>";

functionisA(str){
    if (str.indexOf("href") > -1 && str.indexOf("</a>") > -1){
        returntrue;
    }else{
        returnfalse;
    }
}

console.log(isA(stringOne));
console.log(isA(stringTwo));