我正在学习Node JS,运行代码时出现了“Microsoft Jscript Runtime Error”错误,提示第1行期望对象。
var fs = require('fs');
function FileObject () {
this.filename = null;
this.exists = function(callback) {
var self = this;
fs.open(this.filename, 'r', function(err, handle){
if(err){
console.log(self.filename+ 'does Not exist');
callback(false);
}
else {
console.log(self.filename+ 'does Exist Indeed');
callback(true);
fs.close(handle);
}
});
};
}
var fo = new FileObject();
fo.filename = 'doesnotexist';
fo.exists(function(does_it_exist) {
console.log('results from exists:' + does_it_exist);
});