Is it possible to loop through all JavaScript Array.prototype
function names in a cross-browser friendly way? I know this works in IE9+ and modern browsers:
var names = Object.getOwnPropertyNames(Array.prototype);
names.forEach(function(name) {
console.log(name); // function name
});
Is there a way to get the same list in IE8 & IE7? I tried:
for(var key in Array.prototype) {
console.log(key); // undefined
}
If you are trying to find what is supported in an IE browser before version 9, you can assume that it is a subset of IE9's list and winnow out the ones not supported.
This is the list you get in IE before #9:
concat, constructor, join, length, pop, push, reverse, shift, slice, sort, splice, toLocaleString, toString, unshift
You can test it-
<!doctype html>
<html lang="en">
<head>
<meta charset= "utf-8">
<title>Small Page</title>
<style>
</style>
<script>
onload= function(){
var testnames= ['concat', 'constructor', 'every', 'filter', 'forEach',
'indexOf', 'join', 'lastIndexOf', 'length', 'map', 'pop', 'push', 'reduce',
'reduceRight', 'reverse', 'shift', 'slice', 'some', 'sort', 'splice',
'toLocaleString', 'toString', 'unshift'],
L= 23;
while(L){
if(!(testnames[--L]in Array.prototype)) testnames.splice(L, 1);
}
document.getElementsByTagName('textarea')[0].value= testnames;
}
</script>
</head>
<body>
<p> <textarea rows="8" cols="60"> </textarea> </p>
</body>
</html>
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