IE8 instanceof is failed

[musicode]

class ClassName() {

}

source version

var ClassName = function ClassName() {

}

compressd version

var a = function b() {
    // this instanceof a is true
   //  this instanceof b is false
}

[fregante]

I don't think is is due to rollup because rollup won't change class to function.

Perhaps it's babel or buble.

[elasim]

@musicode
Use this, https://babeljs.io/docs/plugins/transform-jscript/
this plugin will prevent some jscript issues.

[VIGDXX]

@musicode thanks