converse-built/node_modules/@glimmer/util/dist/commonjs/es2017/lib/untouchable-this.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = buildUntouchableThis;

var _env = require("@glimmer/env");

var _platformUtils = require("./platform-utils");

function buildUntouchableThis(source) {
  let context = null;

  if (_env.DEBUG && _platformUtils.HAS_NATIVE_PROXY) {
    let assertOnProperty = property => {
      throw new Error(`You accessed \`this.${String(property)}\` from a function passed to the ${source}, but the function itself was not bound to a valid \`this\` context. Consider updating to use a bound function (for instance, use an arrow function, \`() => {}\`).`);
    };

    context = new Proxy({}, {
      get(_target, property) {
        assertOnProperty(property);
      },

      set(_target, property) {
        assertOnProperty(property);
        return false;
      },

      has(_target, property) {
        assertOnProperty(property);
        return false;
      }

    });
  }

  return context;
}
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