publishExternalAPI
发布扩展API
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angular变量
publishExternalAPI中使用到了angular变量，我们看看它在哪定义的1
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16var
msie, // holds major version number for IE, or NaN if UA is not IE.
jqLite, // delay binding since jQuery could be loaded after us.
jQuery, // delay binding
slice = [].slice,
splice = [].splice,
push = [].push,
toString = Object.prototype.toString,
getPrototypeOf = Object.getPrototypeOf,
ngMinErr = minErr('ng'),
/** @name angular */
//默认在window变量下
angular = window.angular || (window.angular = {}),
angularModule,
uid = 0;
extend扩展函数
publishExternalAPI中使用到了extend函数，我们看看它在哪定义的1
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//内部调用baseExtend函数
function extend(dst) {
//slice函数
//一个新的字符串。包括字符串 stringObject 从 start 开始（包括 start）到 end 结束（不包括 end）为止的所有字符。
return baseExtend(dst, slice.call(arguments, 1), false);
}
//扩展dst对象
//deep是否深度拷贝
//默认false
function baseExtend(dst, objs, deep) {
var h = dst.$$hashKey;
for (var i = 0, ii = objs.length; i < ii; ++i) {
var obj = objs[i];
if (!isObject(obj) && !isFunction(obj)) continue;
var keys = Object.keys(obj);
for (var j = 0, jj = keys.length; j < jj; j++) {
var key = keys[j];
var src = obj[key];
if (deep && isObject(src)) {
if (isDate(src)) {
dst[key] = new Date(src.valueOf());
} else if (isRegExp(src)) {
dst[key] = new RegExp(src);
} else if (src.nodeName) {
dst[key] = src.cloneNode(true);
} else if (isElement(src)) {
dst[key] = src.clone();
} else {
if (!isObject(dst[key])) dst[key] = isArray(src) ? [] : {};
baseExtend(dst[key], [src], true);
}
} else {
dst[key] = src;
}
}
}
setHashKey(dst, h);
return dst;
}
publishExternalAPI最终在源码最后调用，到这时才定义了angular.module方法。