if (typeof fetch === "function") { // Web version of reading a wasm file into an array buffer. let mappingsWasmUrl = null; module.exports = function readWasm() { if (typeof mappingsWasmUrl !== "string") { throw new Error("You must provide the URL of lib/mappings.wasm by calling " + "SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) " + "before using SourceMapConsumer"); } return fetch(mappingsWasmUrl) .then(response => response.arrayBuffer()); }; module.exports.initialize = url => mappingsWasmUrl = url; } else { // Node version of reading a wasm file into an array buffer. const fs = require("fs"); const path = require("path"); module.exports = function readWasm() { return new Promise((resolve, reject) => { const wasmPath = path.join(__dirname, "mappings.wasm"); fs.readFile(wasmPath, null, (error, data) => { if (error) { reject(error); return; } resolve(data.buffer); }); }); }; module.exports.initialize = _ => { console.debug("SourceMapConsumer.initialize is a no-op when running in node.js"); }; }