Object doesn't support 'assign' property or method

[Angelo Palumbo]

Hi all, starting today Internet Explorer 11 returns the error "Object doesn't support 'assign' property or method" when I try to create a line chart with loader.js. Has ever happened to you?

[Patrick Read]

We are experiencing the same - all IE11 users are seeing the above error displaying any charts.

[Philippe Debrabant]

Me too, "Object.assign" is not supported by Internet Explorer.

https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Object/assign#Compatibilit%C3%A9_des_navigateurs

[Philippe Debrabant]

And trying to load a previous version don't work as the same "Object.assign" code is called in https://www.gstatic.com/charts/loader.js:90:18

[Tedd Mason]

Our service is also having the same issue for internet explorer since yesterday.

[Takuma Hashimoto]

We also faced the issue. So we inserted Object.assign polyfill just in front of `google.charts.load(...)` and solved this.

[Tedd Mason]

Hi Takuma, thank you! Polyfill indeed sorts it, I'm wondering though if google will fix this in the meantime or if I need to make the polyfill change, as by the time our change process completes they may have already solved! ha

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[Angelo Palumbo]

Can you post the code, please?

[Tedd Mason]

Source https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Polyfill

if (typeof Object.assign !== 'function') {
  // Must be writable: true, enumerable: false, configurable: true
  Object.defineProperty(Object, "assign", {
    value: function assign(target, varArgs) { // .length of function is 2
      'use strict';
      if (target === null || target === undefined) {
        throw new TypeError('Cannot convert undefined or null to object');
      }

      var to = Object(target);

      for (var index = 1; index < arguments.length; index++) {
        var nextSource = arguments[index];

        if (nextSource !== null && nextSource !== undefined) { 
          for (var nextKey in nextSource) {
            // Avoid bugs when hasOwnProperty is shadowed
            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
              to[nextKey] = nextSource[nextKey];
            }
          }
        }
      }
      return to;
    },
    writable: true,
    configurable: true
  });
}

[Angelo Palumbo]

Works, thanks.

[Dan Espich]

This worked for me as well, I inserted this function before me google.charts.load line. It  evidently rewrites the IE object assign function

        if (typeof Object.assign !== 'function') {

            // Must be writable: true, enumerable: false, configurable: true

            Object.defineProperty(Object, "assign", {

                value: function assign(target, varArgs) { // .length of function is 2

                    'use strict';

                    if (target === null || target === undefined) {

                        throw new TypeError('Cannot convert undefined or null to object');

                    }

                    var to = Object(target);

                    for (var index = 1; index < arguments.length; index++) {

                        var nextSource = arguments[index];

                        if (nextSource !== null && nextSource !== undefined) {

                            for (var nextKey in nextSource) {

                                // Avoid bugs when hasOwnProperty is shadowed

                                if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {

                                    to[nextKey] = nextSource[nextKey];

                                }

                            }

                        }

                    }

                    return to;

                },

                writable: true,

                configurable: true

            });

        }

[Doug Sims]

Same issue here - Same assignPollyfill fix applied - thanks