有几种可能:
试着抓
try {
errorMessage = error.responseJSON.error.message;
} catch(e) { /* ignore the error */}
失败的原因:
Object.defineProperty(error, 'responseJSON', {
get: function() { throw new Error('This will not be shown')
});
&&
errorMessage = error && error.responseJSON && error.responseJSON.error && error.responseJSON.error.message;
失败的原因:
error.responseJSON = 0;
// errorMessage === 0 instead of undefined
function
function getDeepProperty(obj,propstr) {
var prop = propstr.split('.');
for (var i=0; i<prop.length; i++) {
if (typeof obj === 'object')
obj = obj[prop[i]];
}
return obj;
}
errorMessage = getDeepProperty(error, 'responseJSON.error.message');
// you could put it all in a string, if the object is defined in the window scope
失败的原因:
// It's hard(er) to use
功能替代- 请参阅@Olical 的评论
function getDeepProperty(obj) {
for (var i=1; i<arguments.length; i++) {
if (typeof obj === 'object')
obj = obj[arguments[i]];
}
return obj;
}
errorMessage = getDeepProperty(error, 'responseJSON', 'error', 'message');