angular-assertArg

angular 1.5.8 源码解析

/*** throw error if the argument is falsy.*/
* throw error if the argument is falsy.
*/
function assertArg(arg, name, reason) {
    //如果arg 判断错误 就抛出ngMinErr
    if (!arg) {
      throw ngMinErr('areq', "Argument '{0}' is {1}", (name || '?'), (reason || "required"));
    }
    return arg;
}

//接受数组的annotate
//比如['$scope',function($scope){}]
function assertArgFn(arg, name, acceptArrayAnnotation) {
    if (acceptArrayAnnotation && isArray(arg)) {
        arg = arg[arg.length - 1];
    }

    assertArg(isFunction(arg), name, 'not a function, got ' +
        (arg && typeof arg === 'object' ? arg.constructor.name || 'Object' : typeof arg));
    return arg;
}