Files
UglifyJS/test/compress/issue-1443.js
Alex Lam S.L b33e7f88e6 improve unsafe on undefined (#1548)
`unsafe` turns undefined keyword into a variable of the same name if found, but that interferes with other related optimisations.

Keep track of such transformations to ensure zero information loss in the process.
2017-03-05 13:09:27 +08:00

62 lines
1.2 KiB
JavaScript

// tests assume that variable `undefined` not redefined and has `void 0` as value
unsafe_undefined: {
options = {
conditionals: true,
if_return: true,
unsafe: true
}
mangle = {}
input: {
function f(undefined) {
return function() {
if (a)
return b;
if (c)
return d;
};
}
}
expect: {
function f(n) {
return function() {
return a ? b : c ? d : n;
};
}
}
}
keep_fnames: {
options = {
conditionals: true,
if_return: true,
unsafe: true
}
mangle = {
keep_fnames: true
}
input: {
function f(undefined) {
return function() {
function n(a) {
return a * a;
}
if (a)
return b;
if (c)
return d;
};
}
}
expect: {
function f(r) {
return function() {
function n(n) {
return n * n;
}
return a ? b : c ? d : r;
};
}
}
}