You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.6 KiB
44 lines
1.6 KiB
2 years ago
|
var $ = require('../internals/export');
|
||
|
|
var getBuiltIn = require('../internals/get-built-in');
|
||
|
|
var uncurryThis = require('../internals/function-uncurry-this');
|
||
|
|
var fails = require('../internals/fails');
|
||
|
|
var toString = require('../internals/to-string');
|
||
|
|
var validateArgumentsLength = require('../internals/validate-arguments-length');
|
||
|
|
var itoc = require('../internals/base64-map').itoc;
|
||
|
|
|
||
|
|
var $btoa = getBuiltIn('btoa');
|
||
|
|
var charAt = uncurryThis(''.charAt);
|
||
|
|
var charCodeAt = uncurryThis(''.charCodeAt);
|
||
|
|
|
||
|
|
var NO_ARG_RECEIVING_CHECK = !!$btoa && !fails(function () {
|
||
|
|
$btoa();
|
||
|
|
});
|
||
|
|
|
||
|
|
var WRONG_ARG_CONVERSION = !!$btoa && fails(function () {
|
||
|
|
return $btoa(null) !== 'bnVsbA==';
|
||
|
|
});
|
||
|
|
|
||
|
|
var WRONG_ARITY = !!$btoa && $btoa.length !== 1;
|
||
|
|
|
||
|
|
// `btoa` method
|
||
|
|
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-btoa
|
||
|
|
$({ global: true, enumerable: true, forced: NO_ARG_RECEIVING_CHECK || WRONG_ARG_CONVERSION || WRONG_ARITY }, {
|
||
|
|
btoa: function btoa(data) {
|
||
|
|
validateArgumentsLength(arguments.length, 1);
|
||
|
|
if (NO_ARG_RECEIVING_CHECK || WRONG_ARG_CONVERSION || WRONG_ARITY) return $btoa(toString(data));
|
||
|
|
var string = toString(data);
|
||
|
|
var output = '';
|
||
|
|
var position = 0;
|
||
|
|
var map = itoc;
|
||
|
|
var block, charCode;
|
||
|
|
while (charAt(string, position) || (map = '=', position % 1)) {
|
||
|
|
charCode = charCodeAt(string, position += 3 / 4);
|
||
|
|
if (charCode > 0xFF) {
|
||
|
|
throw new (getBuiltIn('DOMException'))('The string contains characters outside of the Latin1 range', 'InvalidCharacterError');
|
||
|
|
}
|
||
|
|
block = block << 8 | charCode;
|
||
|
|
output += charAt(map, 63 & block >> 8 - position % 1 * 8);
|
||
|
|
} return output;
|
||
|
|
}
|
||
|
|
});
|