函数内的全日历-4

在函数中调用时，完整日历 4.3.1 不会初始化。

可选.html示例完美地呈现了日历，但是当我将代码放入函数并从调用该函数时，它不再显示日历。

我已经粘贴了我尝试过的删节可选.html。

<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<link href='../packages/core/main.css' rel='stylesheet' />
<link href='../packages/daygrid/main.css' rel='stylesheet' />
<link href='../packages/timegrid/main.css' rel='stylesheet' />
<script src='../packages/core/main.js'></script>
<script src='../packages/interaction/main.js'></script>
<script src='../packages/daygrid/main.js'></script>
<script src='../packages/timegrid/main.js'></script>
<script>

function OpenProgram()
{
StartCalendar();
}
function StartCalendar()
{  
debugger;
//document.getElementById("calendar").style.visibility = "visible"; 
DrawCalendar1();
//bottomButtons(); 
}
function DrawCalendar1()
{
document.addEventListener('DOMContentLoaded', function() {
var calendarEl = document.getElementById('calendar');
var calendar = new FullCalendar.Calendar(calendarEl, {
plugins: [ 'interaction', 'dayGrid', 'timeGrid' ],
header: {
left: 'prev,next today',
center: 'title',
right: 'dayGridMonth,timeGridWeek,timeGridDay'
},
defaultDate: '2019-08-12',
navLinks: true, // can click day/week names to navigate views
selectable: true,
selectMirror: true,
select: function(arg) {
var title = prompt('Event Title:');
if (title) {
calendar.addEvent({
title: title,
start: arg.start,
end: arg.end,
allDay: arg.allDay
})
}
calendar.unselect()
},
editable: true,
eventLimit: true, // allow "more" link when too many events
events: [
{
title: 'All Day Event',
start: '2019-08-01'
},
{
title: 'Long Event',
start: '2019-08-07',
end: '2019-08-10'
},
{
groupId: 999,
title: 'Repeating Event',
start: '2019-08-09T16:00:00'
},
{
groupId: 999,
title: 'Repeating Event',
start: '2019-08-16T16:00:00'
},
{
title: 'Conference',
start: '2019-08-11',
end: '2019-08-13'
},
{
title: 'Meeting',
start: '2019-08-12T10:30:00',
end: '2019-08-12T12:30:00'
},
{
title: 'Lunch',
start: '2019-08-12T12:00:00'
},
{
title: 'Meeting',
start: '2019-08-12T14:30:00'
},
{
title: 'Happy Hour',
start: '2019-08-12T17:30:00'
},
{
title: 'Dinner',
start: '2019-08-12T20:00:00'
},
{
title: 'Birthday Party',
start: '2019-08-13T07:00:00'
},
{
title: 'Click for Google',
url: 'http://google.com/',
start: '2019-08-28'
}
]
});
calendar.render();
});
}
</script>
<style>
body {
margin: 40px 10px;
padding: 0;
font-family: Arial, Helvetica Neue, Helvetica, sans-serif;
font-size: 14px;
}
#calendar {
max-width: 900px;
margin: 0 auto;
}
</style>
</head>
<body onload="OpenProgram()">
<div id='calendar'></div>
</body>
</html>

调试时，代码没有错误。

如何让日历在从函数内部调用时显示？

同时使用onload和document.addEventListener('DOMContentLoaded'真的没有意义 - 它们都做非常相似的工作，即让代码等到页面加载后再执行。

但是，当您运行document.addEventListener('DOMContentLoaded'时，DOMContentLoaded事件已经发生，因此分配的回调永远不会触发 - 这就是日历永远不会加载的原因。

与其使用内联onload，这通常被认为是一种相当老式的(并且由于在 HTML 中具有内联 JS 而不太可维护(的方式来做到这一点，明智的方法是在任何函数之外处理DOMContentLoaded(因此处理程序在加载脚本块时立即添加(，然后在其中调用您的OpenProgram函数：

<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<link href='../packages/core/main.css' rel='stylesheet' />
<link href='../packages/daygrid/main.css' rel='stylesheet' />
<link href='../packages/timegrid/main.css' rel='stylesheet' />
<script src='../packages/core/main.js'></script>
<script src='../packages/interaction/main.js'></script>
<script src='../packages/daygrid/main.js'></script>
<script src='../packages/timegrid/main.js'></script>    
<script>
document.addEventListener('DOMContentLoaded', OpenProgram);
function OpenProgram()
{
StartCalendar();
}
function StartCalendar()
{  
console.log("here");
//document.getElementById("calendar").style.visibility = "visible"; 
DrawCalendar1();
//bottomButtons(); 
}
function DrawCalendar1()
{
var calendarEl = document.getElementById('calendar');
var calendar = new FullCalendar.Calendar(calendarEl, {
plugins: [ 'interaction', 'dayGrid', 'timeGrid' ],
header: {
left: 'prev,next today',
center: 'title',
right: 'dayGridMonth,timeGridWeek,timeGridDay'
},
defaultDate: '2019-08-12',
navLinks: true, // can click day/week names to navigate views
selectable: true,
selectMirror: true,
select: function(arg) {
var title = prompt('Event Title:');
if (title) {
calendar.addEvent({
title: title,
start: arg.start,
end: arg.end,
allDay: arg.allDay
})
}
calendar.unselect()
},
editable: true,
eventLimit: true, // allow "more" link when too many events
events: [
{
title: 'All Day Event',
start: '2019-08-01'
},
{
title: 'Long Event',
start: '2019-08-07',
end: '2019-08-10'
},
{
groupId: 999,
title: 'Repeating Event',
start: '2019-08-09T16:00:00'
},
{
groupId: 999,
title: 'Repeating Event',
start: '2019-08-16T16:00:00'
},
{
title: 'Conference',
start: '2019-08-11',
end: '2019-08-13'
},
{
title: 'Meeting',
start: '2019-08-12T10:30:00',
end: '2019-08-12T12:30:00'
},
{
title: 'Lunch',
start: '2019-08-12T12:00:00'
},
{
title: 'Meeting',
start: '2019-08-12T14:30:00'
},
{
title: 'Happy Hour',
start: '2019-08-12T17:30:00'
},
{
title: 'Dinner',
start: '2019-08-12T20:00:00'
},
{
title: 'Birthday Party',
start: '2019-08-13T07:00:00'
},
{
title: 'Click for Google',
url: 'http://google.com/',
start: '2019-08-28'
}
]
});
calendar.render();
}
</script>
<style>
body {
margin: 40px 10px;
padding: 0;
font-family: Arial, Helvetica Neue, Helvetica, sans-serif;
font-size: 14px;
}
#calendar {
max-width: 900px;
margin: 0 auto;
}
</style>
</head>
<body>
<div id='calendar'></div>
</body>
</html>

演示：https://codepen.io/ADyson82/pen/YzKQqdr

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