CODEWITHSUNDEEP
javascriptdocumentdomparserdocument.write
R.G.Krish
R.G.Krish

Reputation: 497

Is it possible to change domparser element to string?

I have some HTML string. Use domparser to update some values, now i need back to HTML string format with updated values... Bcoz document.write accept only string.

Checkout the Sample patch,

const domName = 'MOBILE_NO';
// Below dom was getting from api.
const dom =  '<html><head><title>Merchant Checkout Page</title></head><body><center><h1>Please do not refresh this page...</h1></center><form method="post"  name="paytm_form"><input type="hidden" name="MOBILE_NO" value="xxxxxxxx"></form></body></html>';
const parser = new DOMParser();
const parsedHtml = parser.parseFromString(dom, 'text/html');
parsedHtml.getElementsByName(domName)[0].setAttribute('value', '1234567890');

// now i need to replace current update data entire screen
document.write(parsedHtml)

Thanks,

Gopal.R

Upvotes: 3

Views: 2197

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1075537

Bcoz document.write accept only string.

Using document.write is almost always poor practice.

But, if for some reason you really need to, what you get back from parseFromString is a Document object. It has a single documentElement, which you can get the innerHTML or outerHTML of:

document.write(parsedHtml.documentElement.innerHTML);
// or
document.write(parsedHtml.documentElement.outerHTML);

Live Example:

const domName = 'MOBILE_NO';
// Below dom was getting from api.
const dom =  '<html><head><title>Merchant Checkout Page</title></head><body><center><h1>Please do not refresh this page...</h1></center><form method="post"  name="paytm_form"><input type="hidden" name="MOBILE_NO" value="xxxxxxxx"></form></body></html>';
const parser = new DOMParser();
const parsedHtml = parser.parseFromString(dom, 'text/html');
parsedHtml.getElementsByName(domName)[0].setAttribute('value', '1234567890');

// now i need to replace current update data entire screen
document.write(parsedHtml.documentElement.innerHTML);

But, again, probably better to just append to the page, e.g.

document.body.appendChild(parsedHtml.documentElement);

Live Example:

const domName = 'MOBILE_NO';
// Below dom was getting from api.
const dom =  '<html><head><title>Merchant Checkout Page</title></head><body><center><h1>Please do not refresh this page...</h1></center><form method="post"  name="paytm_form"><input type="hidden" name="MOBILE_NO" value="xxxxxxxx"></form></body></html>';
const parser = new DOMParser();
const parsedHtml = parser.parseFromString(dom, 'text/html');
parsedHtml.getElementsByName(domName)[0].setAttribute('value', '1234567890');

document.body.appendChild(parsedHtml.documentElement);

Or loop through it and append its children:

let child = parsedHtml.documentElement.firstChild;
while (child) {
    let next = child.nextSibling;
    document.documentElement.appendChild(child);
    child = next;
}

Live Example:

const domName = 'MOBILE_NO';
// Below dom was getting from api.
const dom =  '<html><head><title>Merchant Checkout Page</title></head><body><center><h1>Please do not refresh this page...</h1></center><form method="post"  name="paytm_form"><input type="hidden" name="MOBILE_NO" value="xxxxxxxx"></form></body></html>';
const parser = new DOMParser();
const parsedHtml = parser.parseFromString(dom, 'text/html');
parsedHtml.getElementsByName(domName)[0].setAttribute('value', '1234567890');

let child = parsedHtml.documentElement.firstChild;
while (child) {
    let next = child.nextSibling;
    document.documentElement.appendChild(child);
    child = next;
}

Upvotes: 3

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