I am trying to load a random image from a dictionary on page load using Javascript. This is the HTML
<div class="img-container">
{% load static %}
<img id="qimage" src="{% static '' %}"></img>
</div>
So basically I want to change the src to a random generated image src from dictionary on page load: this is the Javascript:
window.onload = function(){
var image = document.getElementById("qimage");
let src = getRandomImage();
image.setAttribute("src",src);
}
And this is the generate random image function:
function getRandomImage(){
var keys = Object.keys(dict);
var index = getRandomInt(0,keys.length);
var selection = keys[index];
var image = dict[selection][0];
return image;
}
and lastly this is the dictionary:
var dict = {
"barrackStreet":["{% static 'images/hard/bstreet.jpg' %}",{"lat":51.893897,"lng":-8.477632}],
"GrandParade":["{% static 'images/hard/gparade.jpg' %}",{"lat":51.893897,"lng":-8.477632}],
"PatricksHill":["{% static 'images/hard/phill.jpg' %}",{"lat":51.893897,"lng":-8.477632}],
};
Why don't you move that logic to Python/Django? In that way you won't need to write JS code. Note this will only work if your dict
variable has a fixed value and not randomly generated from JS side.
You can use Django's a built-in filter random to randomly choose a value from a list. Make a list containing your image directories like this:
dict = {
"barrackStreet":["{% static 'images/hard/bstreet.jpg' %}",{"lat":51.893897,"lng":-8.477632}],
"GrandParade":["{% static 'images/hard/gparade.jpg' %}",{"lat":51.893897,"lng":-8.477632}],
"PatricksHill":["{% static 'images/hard/phill.jpg' %}",{"lat":51.893897,"lng":-8.477632}],
}
img_list = [v[0] for k,v in dict.items()]
Then pass that from your view to your template and in your template render it like this:
<img id="qimage" src="{{ img_list|random }}"></img>
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.