Convert a string to a javascript code

Question

I have the folowing string variable returned from a textarea : jtext = $('#putJS').val();

The result of this string is the following:

ctx.beginPath();
    ctx.moveTo(172 + xoff, 29 + yoff);
    ctx.bezierCurveTo(183 + xoff, 33 + yoff, 199 + xoff, 36 + yoff, 201 + xoff, 74 + yoff);
    ctx.bezierCurveTo(191 + xoff, 91 + yoff, 197 + xoff, 130 + yoff, 196 + xoff, 110 + yoff);
    ctx.bezierCurveTo(195 + xoff, 95 + yoff, 200 + xoff, 230 + yoff, 200 + xoff, 248 + yoff);
    ctx.bezierCurveTo(200 + xoff, 256 + yoff, 85 + xoff, 251 + yoff, 70 + xoff, 251 + yoff);
    ctx.bezierCurveTo(65 + xoff, 251 + yoff, 74 + xoff, 122 + yoff, 71 + xoff, 106 + yoff);
    ctx.bezierCurveTo(68 + xoff, 88 + yoff, 65 + xoff, 87 + yoff, 65 + xoff, 73 + yoff);
    ctx.bezierCurveTo(65 + xoff, 52 + yoff, 70 + xoff, 35 + yoff, 95 + xoff, 28 + yoff);
    ctx.bezierCurveTo(99 + xoff, 37 + yoff, 130 + xoff, 72 + yoff, 171 + xoff, 29 + yoff);
    ctx.stroke();

The question is, how do I put this string as javascript code to design the canvas in my code javascript file?

Just put in a <script> tag and insert that into the document? But be careful about what code you execute there! — Sirko
– Sirko, Commented May 21, 2013 at 11:49
We have to assume here that the object referenced by ctx exists already within the page. — Mark Schultheiss
– Mark Schultheiss, Commented May 21, 2013 at 11:59

VisioN · Accepted Answer · 2013-05-21 11:51:35Z

1

There is an eval function in with you can pass any string. SImple example you can find here: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/eval

But using eval function could be dangerous, so be careful with this.

edited May 21, 2013 at 11:51

VisioN

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answered May 21, 2013 at 11:50

Piotr Stapp

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