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✓ a = a + x ==> a+=x
*******
✓ join consecutive var statements
*******
✓
x == false ==> x == 0
x == true ==> x == 1
should warn too;
JS is so sloppy that this could be an indication of a bug.
*******
✓
x, x ==> x
x = foo, x ==> x
other similar cases?
*******
Try to concatenate all scripts somehow before starting minification;
the issue will be keeping track of the current source file for
generating source maps. perhaps store that in the AST? Have a single
AST_Toplevel for all files.
XXX? Not sure if this is worth the trouble.
*******
✓
discard spurious break statements
*******
for (...) {
if (foo) continue;
...
}
==>
for (...) {
if (!foo) { ... }
}
*******
The following seems to compress suboptimally. Should probably run more
passes somewhere.
function setOpacity(el, o) {
if (o != null) {
if (o == "" && o != 0) {
is_ie
? el.style.filter = ""
: el.style.opacity = "";
} else {
is_ie
? el.style.filter = "alpha(opacity=" + Math.round(o * 100) + ")"
: el.style.opacity = o;
}
return o;
} else {
if (!is_ie)
return parseFloat(el.style.opacity);
else
if (/alpha\(opacity=([0-9.])+\)/.test(el.style.opacity))
return parseFloat(RegExp.$1);
}
}
*******
|
