使用Django模板,我正在尝试在JavaScript中添加倒计时。将脚本明确放在HTML中可以工作,但是加载后就不起作用了。我认为我已经接近成功了,但是我无法确定缺少什么:/。
下面是一个可工作的代码片段:
但是,当我从HTML中删除脚本并将其放在
下面是一个可工作的代码片段:
<!DOCTYPE html>
<head>
{% load staticfiles %}
</head>
<body>
{% if remaining_time %}
<script>
function startTimer(duration, display) {
var timer = duration;
var end = setInterval(function () {
minutes = parseInt(timer / 60, 10);
seconds = parseInt(timer % 60, 10);
minutes = minutes < 10 ? "0" + minutes : minutes;
seconds = seconds < 10 ? "0" + seconds : seconds;
display.textContent = minutes + ":" + seconds;
if (--timer < 0) {
clearInterval(end);
document.form_submit_answer.submit()
}
}, 1000);
}
window.onload = function () {
var allowed_time_seconds = "{{remaining_time | safe}}",
display = document.querySelector('#time');
startTimer(allowed_time_seconds, display);
};
</script>
{% endif %}
{{ current_question.title }}
<div>
<form name="form_submit_answer" action="{% url 'assignment_completion' token current_question_num %}"
method="post">
{% csrf_token %}
{{ form }}
<div>
{% if next_question %}
<input type="submit" value="Send your answer and go to the next question">
{% else %}
<input type="submit" value="Send your answer and end the assignment">
{% endif %}
</div>
</form>
</div>
<div>
TOKEN : {{ token }}
</div>
{% if remaining_time %}
<div>Time remaining : <span id="time">{{initial_remaining_time}}</span></div>
{% endif %}
</body>
</html>
但是,当我从HTML中删除脚本并将其放在
/static/js/timer.js
中,然后在<head>
中进行导入,它就不能正常工作了,initial_remaining_time
被显示,但它每秒钟不会减少。
下面是我的代码片段,它无法正常工作:
<head>
{% load staticfiles %}
{% if remaining_time %}
<script src="{ % static 'js/timer.js' % }"></script>
{% endif %}
</head>
期望结果:显示初始时间,然后递减至0,在0时发送表单!
实际上,当将timer.js放在/static/js/timer.js中时,只显示初始时间,然后似乎未加载和运行javascript一样,没有任何反应。
追踪: (nkFjLIDrya1BrWd2bqYnq7TC5bpGCRGW3HcDXa6cqYI是一个令牌)
[18/Jul/2019 11:12:32] "GET /nkFjLIDrya1BrWd2bqYnq7TC5bpGCRGW3HcDXa6cqYI/2 HTTP/1.1" 200 1017
Not Found: /nkFjLIDrya1BrWd2bqYnq7TC5bpGCRGW3HcDXa6cqYI/{ % static 'js/timer.js' % }
[18/Jul/2019 11:12:32] "GET /nkFjLIDrya1BrWd2bqYnq7TC5bpGCRGW3HcDXa6cqYI/%7B%20%%20static%20'js/timer.js'%20%%20%7D HTTP/1.1" 404 2617
STATICFILES_DIRS = ( os.path.join(BASE_DIR, "static"), )
就像这里回答的一样(https://dev59.com/L10a5IYBdhLWcg3wdIbo)此外,我还必须定义一个全局变量:window.onload = function () { var allowed_time_seconds = remaining_time_js, display = document.querySelector('#time'); startTimer(allowed_time_seconds, display); };
- Philippe