924aa58060
- a = a + x ==> a+=x - joining consecutive var statements (hoisting is not always desirable) - x == false ==> x == 0, x != true ==> x != 1 - x, x ==> x; x = exp(), x ==> x = exp() - discarding useless break-s
80 lines
1.4 KiB
Plaintext
80 lines
1.4 KiB
Plaintext
✓ a = a + x ==> a+=x
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*******
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✓ join consecutive var statements
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*******
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✓
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x == false ==> x == 0
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x == true ==> x == 1
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should warn too;
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JS is so sloppy that this could be an indication of a bug.
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*******
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✓
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x, x ==> x
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x = foo, x ==> x
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other similar cases?
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*******
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Try to concatenate all scripts somehow before starting minification;
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the issue will be keeping track of the current source file for
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generating source maps. perhaps store that in the AST? Have a single
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AST_Toplevel for all files.
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XXX? Not sure if this is worth the trouble.
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*******
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✓
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discard spurious break statements
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*******
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for (...) {
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if (foo) continue;
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...
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}
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==>
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for (...) {
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if (!foo) { ... }
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}
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*******
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The following seems to compress suboptimally. Should probably run more
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passes somewhere.
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function setOpacity(el, o) {
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if (o != null) {
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if (o == "" && o != 0) {
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is_ie
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? el.style.filter = ""
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: el.style.opacity = "";
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} else {
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is_ie
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? el.style.filter = "alpha(opacity=" + Math.round(o * 100) + ")"
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: el.style.opacity = o;
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}
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return o;
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} else {
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if (!is_ie)
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return parseFloat(el.style.opacity);
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else
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if (/alpha\(opacity=([0-9.])+\)/.test(el.style.opacity))
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return parseFloat(RegExp.$1);
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}
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}
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*******
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