我有三个文件：tasker_matic.js，tasker.js和tasker.html。我完全不能编辑tasker.html或tasker.js。我将使用tasker_matic与tasker.js库进行通信。
现在我正在尝试访问其登录功能。登录正确时，应弹出警告，提示工作正常；登录不正确时，应显示警告禁止访问。这就是我遇到的问题。如果我连续单击登录按钮，它将最终弹出警告，但不是每次都弹出。有人知道为什么是这样吗？
Tasker_matic.js：
function login(e) {
var userName = document.getElementById("usernameInput").value;
var password = document.getElementById("passwordInput").value;
tasker.login( userName, password, (err, user) => {
if (err) {
alert( err );
}
else if (user) {
alert("it worked");
}
});
}
function createTask(s) {
let descNode;
let theTable = document.getElementById('tasks');
let row = document.createElement('tr');
let description = document.createElement('th');
descNode = document.createTextNode(s);
description.append(descNode);
row.append(description);
theTable.append(row);
}
tasker.html：
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title>Tasker</title>
<script src="tasker.js"></script>
<link rel="stylesheet" href="tasker_matic.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="tasker_matic.js"></script>
</head>
<body>
<div class="container">
<div id="login" class="on">
<h1>Login</h1><br>
<form style="width:50%">
<input id="usernameInput" type="text" name="username" placeholder="Username" class="form-control">
<input id="passwordInput" type="password" name="password" placeholder="Password" class="form-control">
<input type="submit" value="Login" class="btn btn-primary pull-right" onclick="login(event)">
</form>
</div>
<div id="home" class="off">
<h1>Tasker <small><span class="pull-right btn btn-primary btn-sm" id="logout" onclick="logout()"></span></small></h1>
<div class="well well-sm">
<form class="form-inline">
<div class="form-group">
<label for="descField">Description</label>
<input class="form-control" type="text" placeholder="Description" id="descField">
</div>
<div class="form-group">
<label for="cField">Color Code</label>
<input class="form-control" type="color" id="cField"/>
</div>
<div class="form-group">
<label for="dField">Due Date</label>
<input class="form-control" type="date" id="dField"/>
</div>
<input class="form-control" type="button" value="+" id="addButton" onclick="addTask()"/>
</form>
</div>
<div class="well well-sm">
<form class="form-inline">
<input class="form-control" type="text" placeholder="search" id="searchField" style="width:25%" onkeyup="searchTextChange()"/>
<div class="checkbox">
<label>
<input type="checkbox" id="incompleteBox" onclick="incompleteChange()"/>Incomplete Only
</label>
</div>
<div class="checkbox">
<label>
<input type="checkbox" id="overdueBox" onclick="overdueChange()"/>Over-due only
</label>
</div>
</form>
</div>
<table id="tasks" class="table table-striped">
</table>
</div>
</div>
</body>
</html>
tasker.js：
let tasker = (function () {
let verbs = [
"make",
"install",
"update",
"generate data for",
"talk to",
"schedule a time for",
"develop a plan for",
"knit",
"create",
"build",
"write",
"get",
"finish",
"call",
"arrange",
"submit",
"talk to",
"do",
"protest",
"collect",
"shop for"
];
let nouns = [
"a cake",
"the boat",
"our wedding",
"the garage",
"the tow truck",
"our shed",
"1090 tax form",
"the IRS agent",
"milk",
"some LED lights",
"monthly budget",
"marketing plan",
"the flowers",
"an albatross"
];
let userNames = [
"frodo baggins",
"gandalf gray",
"smaug dragon"
];
let Task = function (id, ownerId, desc, due, color, complete) {
this.ownerId = ownerId;
this.desc = desc;
this.due = due;
this.color = color;
this.complete = complete;
this.id = id || randomId();
};
let randomId = function () {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}
let randomColor = function () {
let pad = function (v) {
return v.length == 1 ? '0' + v : v;
}
r = Math.floor(Math.random() * 256).toString(16);
g = Math.floor(Math.random() * 256).toString(16);
b = Math.floor(Math.random() * 256).toString(16);
return '#' + pad(r) + pad(g) + pad(b);
}
let randomDate = function () {
year = Math.floor(Math.random() * 14 + 2010);
month = Math.floor(Math.random() * 12);
day = Math.floor(Math.random() * 31);
return new Date(year, month, day);
};
let choose = function (things) {
let i = Math.floor(Math.random() * things.length);
return things[i];
}
let randomDescription = function () {
return choose(verbs) + ' ' + choose(nouns);
};
let makeList = function (ownerId, n) {
result = [];
for (i = 0; i < n; i += 1) {
result.push(new Task(null,
ownerId,
randomDescription(),
randomDate(),
randomColor(),
choose([true, false])));
}
return result;
}
let updateTask = function( oldTask, editedTask ) {
let propertiesToCopy = ['desc', 'due', 'color', 'complete' ];
propertiesToCopy.forEach( prop => {
if( editedTask.hasOwnProperty( prop ) ) {
oldTask[prop] = editedTask[prop];
}
});
}
let state = {
users: userNames.reduce(function (acc, cv) {
let parts = cv.split(' '); //
let name = parts[0];
let email = parts[0][0] + parts[1] + '@uwlaxer.edu';
let id = randomId();
let password = parts[1];
let tasks = makeList(id, Math.random() * 50 + 20).reduce((acc, t) => { acc[t.id] = t; return acc; }, {});
acc[id] = {
name: name,
email: email,
id: id,
password: password,
tasks: tasks
};
return acc;
}, {}),
user: null
};
let getTask = function (ownerId, id) {
try {
return state.users[ownerId].tasks[id];
} catch (e) {
return null;
}
}
let getUserByName = function (name) {
for (id in state.users) {
if (state.users[id] && state.users[id].name === name) {
return state.users[id];
}
}
return null;
}
let taskList = function (ownerId) {
let result = [];
for (let tid in state.user.tasks) {
result.push(state.user.tasks[tid]);
}
return result.sort((a, b) => b.due.getTime() - a.due.getTime());
}
let respond = function (error, value, cb) {
window.setTimeout(() => cb(error, value), Math.random() * 1500);
}
let copyTask = function( task ) {
return new Task(task.id, task.ownerId, task.desc, task.due, task.color, task.complete);
}
return {
login: function ( username, passwd, cb) {
let user = getUserByName( username );
if (user && user.password === passwd) {
state.user = user;
let cleansedUser = { name: user.name, email: user.email, id: user.id };
respond(null, cleansedUser, cb);
} else {
respond('forbidden', null, cb);
}
},
logout: function (cb) {
state.user = null;
respond(null, true, cb);
},
tasks: function (ownerId, cb) {
if (ownerId === state.user.id) {
let tasks = taskList(ownerId).map(u => new Task(u.id, u.ownerId, u.desc, u.due, u.color, u.complete));
respond(null, tasks, cb);
} else {
respond('forbidden', null, cb);
}
},
add: function (ownerId, task, cb) {
if (state.user.id == ownerId) {
if (task.desc && task.due && task.color) {
let due = new Date(task.due);
let task = new Task(task.id, ownerId, task.desc, due, task.color, Boolean(task.complete));
state.users[ownerId].tasks[task.id] = task;
respond(null, task, cb);
} else {
respond('invalid task', null, cb);
}
} else {
respond('forbidden', null, cb);
}
},
delete: function (ownerId, taskId, cb) {
if (state.user.id === ownerId) {
let task = state.users[ownerId].tasks[taskId];
delete state.users[ownerId].tasks[taskId];
if (task) {
respond(null, task, cb);
} else {
respond('no such task', null, cb);
}
} else {
respond('forbidden', null, cb);
}
},
edit: function (ownerId, taskId, task, cb) {
if (state.user.id == ownerId) {
if (taskId) {
let oldTask = getTask(ownerId, taskId);
if( oldTask) {
updateTask( oldTask, task );
respond( null, copyTask( oldTask ), cb );
} else {
respond( 'no such task', null, cb );
}
} else {
respond( 'no such task', null, cb );
}
} else {
respond( 'forbidden', null, cb );
}
}
}
})();