Failed to minify the bundle. Error: static/js/main.XXXXXX.js from UglifyJs

[yingapp]

Failed to minify the bundle. Error: static/js/main.XXXXXX.js from UglifyJs
Unexpected token: name (index) [static/js/main.XXXXX.js:XXXXX,5]

const c = 'color: ' + this.color;
args.splice(1, 0, c, 'color: inherit');

// The final "%c" is somewhat tricky, because there could be other
// arguments passed either before or after the %c, so we need to
// figure out the correct index to insert the CSS into

let index = 0; //XXXXX  error line


let lastC = 0;
args[0].replace(/%[a-zA-Z%]/g, match => {
	if (match === '%%') {
		return;
	}
	index++;
	if (match === '%c') {
		// We only are interested in the *last* %c
		// (the user may have provided their own)
		lastC = index;
	}
});

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[feross]

You need to use babel-minify or another minifier that supports modern ES syntax.