I am trying to change a the width value of my div using javascript. Using:
document.getElementById("id").style.width = "25%";
works fine for string literals, but I want to set the value using a variable.
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I believe this is the same question as this. Maybe I was wrong with understanding of your question, what have you tried and didn't work?gdoron– gdoron2012-11-13 18:01:56 +00:00Commented Nov 13, 2012 at 18:01
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Hey, thanks for replying! Your solution would have worked great, but I needed to calculate a value and then append a string like "%" or "px". I don't quite know this ins and outs of javascript, and didn't know that you could convert from int to string just by appending a string.Oliver– Oliver2012-11-13 18:38:27 +00:00Commented Nov 13, 2012 at 18:38
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1 Answer
When concatenating strings and variables javascript will use their string representation, try the following:
var variable = 25;
document.getElementById("id").style.width = variable + "%";
4 Comments
Onur Topal
just to be sure you can use variable.toString().
gdoron
@OnurTOPAL. Just be sure to delete the comment, when you concat a variable with a string there is an implicit conversion to string. :)
Rich O'Kelly
@OnurTOPAL This behaviour is well defined. There is no need to explicitly call toString() - it would just be wasted keystrokes.
Onur Topal
yes in this case it is not need but if you can check this url jsfiddle.net/S37vw I know y++ just convert it to int but that also means JS easily convert types. that s why I said to be sure.