CODEWITHSUNDEEP
javascriptevaldocument.write
Ben Daniel
Ben Daniel

Reputation: 5

Why am I recieving the error 'document.write can be a form of eval'?

This is all I've got going, but my debugger says 'document.write can be a form of eval,' and my jsonString variable prints as undefined. Any help is appreciated, thanks. 

function getUrlVars() {
        var map = {};
        var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
                                                 map[key] = value;
                                                 });
        return map;
    }

    var jsonString = getUrlVars()['json'];
    document.write(jsonString);

Upvotes: 0

Views: 2061

Answers (1)

Samuel Edwin Ward
Samuel Edwin Ward

Reputation: 6675

The reason document.write can be a form of eval is because if you write a script element it will be evaluated.

As for why your jsonString is undefined, you probably don't have a parameter named 'json'.

Upvotes: 3

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