Img Url From Base 64 Data Javascript

I have base64 data and I need to convert to image src I know the format: document.getElementById('img').setAttribute( 'src', 'data:image/png;base64, stringdatahere' ); But I don't

Solution 1:

Use string concatenation:

document.getElementById('img').setAttribute( 'src', 'data:image/png;base64,' + dataObject.base64 );

Solution 2:

If you have the data in a variable then just

document.getElementById('img').setAttribute( 'src', 'data:image/png;base64,' + dataVariableName );