问题
I am getting the following error in IE 11:
SCRIPT5007: unable to get property "toString" of undefined or null reference recaptcha__iw.js (451, 41)
Could it be possible that there is an error in the script?
Working on Safari, Chrome and Firefox.
回答1:
Add this meta on the html header to enable some HTML5 feature for Internet Explorer 11..
<meta http-equiv="X-UA-Compatible" content="IE=edge">
If it's not working then open Compability View Settings and remove google.com
Open developer tools and go to Emulation tab then change document mode to Edge..
If it's still not working then add this polyfill on the header..
<script src="https://cdn.polyfill.io/v2/polyfill.js"></script>
Actually invisible recaptcha already supported for Android Stock Browser 4.0+ too.. So you don't need to worry if only old browser that doesn't supported..
回答2:
The answer of Ruthi works on IE, but not on Google Chrome (error at runtime), so, for a cross-browser solution, you need first to ensure that the browser can handle querySelector().setActive
So, put this javascript code before the recaptcha rendering:
if(document.querySelector('body').setActive != undefined)
{
document.querySelector('body').setActive();
}
回答3:
Add this line to your script where the file recaptcha_*.js is downloaded
document.querySelector('body').setActive();
回答4:
just add this polyfill (taked from cdn.polyfill.io)
(function(undefined) {
// Symbol
// A modification of https://github.com/WebReflection/get-own-property-symbols
// (C) Andrea Giammarchi - MIT Licensed
(function(Object, GOPS, global) {
var setDescriptor;
var id = 0;
var random = '' + Math.random();
var prefix = '__\x01symbol:';
var prefixLength = prefix.length;
var internalSymbol = '__\x01symbol@@' + random;
var DP = 'defineProperty';
var DPies = 'defineProperties';
var GOPN = 'getOwnPropertyNames';
var GOPD = 'getOwnPropertyDescriptor';
var PIE = 'propertyIsEnumerable';
var ObjectProto = Object.prototype;
var hOP = ObjectProto.hasOwnProperty;
var pIE = ObjectProto[PIE];
var toString = ObjectProto.toString;
var concat = Array.prototype.concat;
var cachedWindowNames = typeof window === 'object' ? Object.getOwnPropertyNames(window) : [];
var nGOPN = Object[GOPN];
var gOPN = function getOwnPropertyNames(obj) {
if (toString.call(obj) === '[object Window]') {
try {
return nGOPN(obj);
} catch (e) {
// IE bug where layout engine calls userland gOPN for cross-domain `window` objects
return concat.call([], cachedWindowNames);
}
}
return nGOPN(obj);
};
var gOPD = Object[GOPD];
var create = Object.create;
var keys = Object.keys;
var freeze = Object.freeze || Object;
var defineProperty = Object[DP];
var $defineProperties = Object[DPies];
var descriptor = gOPD(Object, GOPN);
var addInternalIfNeeded = function(o, uid, enumerable) {
if (!hOP.call(o, internalSymbol)) {
try {
defineProperty(o, internalSymbol, {
enumerable: false,
configurable: false,
writable: false,
value: {}
});
} catch (e) {
o[internalSymbol] = {};
}
}
o[internalSymbol]['@@' + uid] = enumerable;
};
var createWithSymbols = function(proto, descriptors) {
var self = create(proto);
gOPN(descriptors).forEach(function(key) {
if (propertyIsEnumerable.call(descriptors, key)) {
$defineProperty(self, key, descriptors[key]);
}
});
return self;
};
var copyAsNonEnumerable = function(descriptor) {
var newDescriptor = create(descriptor);
newDescriptor.enumerable = false;
return newDescriptor;
};
var get = function get() {};
var onlyNonSymbols = function(name) {
return name != internalSymbol &&
!hOP.call(source, name);
};
var onlySymbols = function(name) {
return name != internalSymbol &&
hOP.call(source, name);
};
var propertyIsEnumerable = function propertyIsEnumerable(key) {
var uid = '' + key;
return onlySymbols(uid) ? (
hOP.call(this, uid) &&
this[internalSymbol]['@@' + uid]
) : pIE.call(this, key);
};
var setAndGetSymbol = function(uid) {
var descriptor = {
enumerable: false,
configurable: true,
get: get,
set: function(value) {
setDescriptor(this, uid, {
enumerable: false,
configurable: true,
writable: true,
value: value
});
addInternalIfNeeded(this, uid, true);
}
};
try {
defineProperty(ObjectProto, uid, descriptor);
} catch (e) {
ObjectProto[uid] = descriptor.value;
}
return freeze(source[uid] = defineProperty(
Object(uid),
'constructor',
sourceConstructor
));
};
var Symbol = function Symbol(description) {
if (this instanceof Symbol) {
throw new TypeError('Symbol is not a constructor');
}
return setAndGetSymbol(
prefix.concat(description || '', random, ++id)
);
};
var source = create(null);
var sourceConstructor = {
value: Symbol
};
var sourceMap = function(uid) {
return source[uid];
};
var $defineProperty = function defineProp(o, key, descriptor) {
var uid = '' + key;
if (onlySymbols(uid)) {
setDescriptor(o, uid, descriptor.enumerable ?
copyAsNonEnumerable(descriptor) : descriptor);
addInternalIfNeeded(o, uid, !!descriptor.enumerable);
} else {
defineProperty(o, key, descriptor);
}
return o;
};
var onlyInternalSymbols = function(obj) {
return function(name) {
return hOP.call(obj, internalSymbol) && hOP.call(obj[internalSymbol], '@@' + name);
};
};
var $getOwnPropertySymbols = function getOwnPropertySymbols(o) {
return gOPN(o).filter(o === ObjectProto ? onlyInternalSymbols(o) : onlySymbols).map(sourceMap);
};
descriptor.value = $defineProperty;
defineProperty(Object, DP, descriptor);
descriptor.value = $getOwnPropertySymbols;
defineProperty(Object, GOPS, descriptor);
descriptor.value = function getOwnPropertyNames(o) {
return gOPN(o).filter(onlyNonSymbols);
};
defineProperty(Object, GOPN, descriptor);
descriptor.value = function defineProperties(o, descriptors) {
var symbols = $getOwnPropertySymbols(descriptors);
if (symbols.length) {
keys(descriptors).concat(symbols).forEach(function(uid) {
if (propertyIsEnumerable.call(descriptors, uid)) {
$defineProperty(o, uid, descriptors[uid]);
}
});
} else {
$defineProperties(o, descriptors);
}
return o;
};
defineProperty(Object, DPies, descriptor);
descriptor.value = propertyIsEnumerable;
defineProperty(ObjectProto, PIE, descriptor);
descriptor.value = Symbol;
defineProperty(global, 'Symbol', descriptor);
// defining `Symbol.for(key)`
descriptor.value = function(key) {
var uid = prefix.concat(prefix, key, random);
return uid in ObjectProto ? source[uid] : setAndGetSymbol(uid);
};
defineProperty(Symbol, 'for', descriptor);
// defining `Symbol.keyFor(symbol)`
descriptor.value = function(symbol) {
if (onlyNonSymbols(symbol))
throw new TypeError(symbol + ' is not a symbol');
return hOP.call(source, symbol) ?
symbol.slice(prefixLength * 2, -random.length) :
void 0;
};
defineProperty(Symbol, 'keyFor', descriptor);
descriptor.value = function getOwnPropertyDescriptor(o, key) {
var descriptor = gOPD(o, key);
if (descriptor && onlySymbols(key)) {
descriptor.enumerable = propertyIsEnumerable.call(o, key);
}
return descriptor;
};
defineProperty(Object, GOPD, descriptor);
descriptor.value = function(proto, descriptors) {
return arguments.length === 1 || typeof descriptors === "undefined" ?
create(proto) :
createWithSymbols(proto, descriptors);
};
defineProperty(Object, 'create', descriptor);
descriptor.value = function() {
var str = toString.call(this);
return (str === '[object String]' && onlySymbols(this)) ? '[object Symbol]' : str;
};
defineProperty(ObjectProto, 'toString', descriptor);
setDescriptor = function(o, key, descriptor) {
var protoDescriptor = gOPD(ObjectProto, key);
delete ObjectProto[key];
defineProperty(o, key, descriptor);
if (o !== ObjectProto) {
defineProperty(ObjectProto, key, protoDescriptor);
}
};
}(Object, 'getOwnPropertySymbols', this));}).call('object' === typeof window && window || 'object' === typeof self && self || 'object' === typeof global && global || {});
回答5:
I had to remove
import '@babel/polyfill
inside my bundled js file (through this Symbol.Iterator was overwritten and caused the trouble).
来源：https://stackoverflow.com/questions/47669463/google-recaptcha-error-in-ie-11