Created
September 12, 2011 16:11
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Get relative file path in JavaScript
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/** | |
* Given a source directory and a target filename, return the relative | |
* file path from source to target. | |
* @param source {String} directory path to start from for traversal | |
* @param target {String} directory path and filename to seek from source | |
* @return Relative path (e.g. "../../style.css") as {String} | |
*/ | |
function getRelativePath(source, target) { | |
var sep = (source.indexOf("/") !== -1) ? "/" : "\\", | |
targetArr = target.split(sep), | |
sourceArr = source.split(sep), | |
filename = targetArr.pop(), | |
targetPath = targetArr.join(sep), | |
relativePath = ""; | |
while (targetPath.indexOf(sourceArr.join(sep)) === -1) { | |
sourceArr.pop(); | |
relativePath += ".." + sep; | |
} | |
var relPathArr = targetArr.slice(sourceArr.length); | |
relPathArr.length && (relativePath += relPathArr.join(sep) + sep); | |
return relativePath + filename; | |
} | |
console.log(getRelativePath("/users/eric/src/csslint", "/users/eric/style.css")); |
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In NodeJS you could use path.relative(from, to)