mapbox-gl/build/strictify.js

A WebGL interactive maps library

const through = require('through2');
const path = require('path');

module.exports = (file) => {
    if (path.extname(file) === '.json') {
        return through();
    }
    let first = true;
    return through(function (chunk, encoding, callback) {
        if (first) {
            this.push("'use strict';");
            first = false;
        }
        this.push(chunk);
        callback();
    });
};