screw_ie8 in Node.js 6.3.1

[rostik404]

screw_ie8 option doesn't work in Node.js 6.3.1. When I use it, I'm getting error: screw_ie8 is not a supported option

[avdg]

Make sure you passed the option under beautify settings

[eGavr]

@avdg

Please, сan you provide an example? How should I pass this option?

I do this way:

{ 
    compress: {screw_ie8: false},
    mangle: {screw_ie8: false}, 
    output: {screw_ie8: false}
}

This works for ie8 and in node@4.x fine, but fails in node@6.x :(

[kzc]

Just verified it works correctly with node 6.3.1.

$ cat min.js
var flag = process.argv[2];
var screw_ie8 = flag === undefined ? true : JSON.parse(flag);
console.log("// screw_ie8 =", screw_ie8);
var src = "console.log({var:'\v'});";
console.log(require("uglify-js").minify(src, {
    fromString: true,
    compress: { screw_ie8: screw_ie8 },
    mangle:   { screw_ie8: screw_ie8 },
    output:   { screw_ie8: screw_ie8 },
}).code);

$ uglifyjs -V
uglify-js 2.7.0

$ node -v
v6.3.1

$ node ./min.js true
// screw_ie8 = true
console.log({var:"\v"});

$ node ./min.js false
// screw_ie8 = false
console.log({"var":"\x0B"});

Also verified against node 0.10.x, 0.12.x, node 4.x and node 5.x.

See also: #1213 (comment) and #1201 (comment)

[avdg]

oh yeah, there are multiple settings with ie8 :/

And kzc knows better than me.

[rostik404]

I had this problem in uglify-js 2.3.6.
In new version everything is ok.

Thank you! 😊