CODEWITHSUNDEEP
javascriptjqueryvideo
Caspert
Caspert

Reputation: 4363

Issue with play video once on scroll?

I use the following code to play a video if the section #user-experience is reached on scroll:

JS:

var player = $('video');

function isInView(elem){
    return $(elem).offset().top - $(window).scrollTop() < $(elem).height();
}

$(window).scroll(function() {

    if (isInView($('#user-experience'))) {
        // console.log('play video');
        player.get(0).play();
    }

});

HTML:

<video>
    <source src="images/browser.webm" type="video/webm">
    <source src="images/browser.mp4" type="video/mp4">
    Your browser does not support HTML5 video.
</video>

The problem with the code is that it will fire the script every time the user scrolls a little bit, until the section is not visible in the browser viewport. The code should only fire once if the user scrolled to the #user-experience section. When scroll to another section and back, the video should not play for the second time.

How do I fix this?

Upvotes: 1

Views: 1244

Answers (1)

Jack Guy
Jack Guy

Reputation: 8523

Like this?

var player = $('video');
var hasReachedUserExperience = false;

function isInView(elem){
    return $(elem).offset().top - $(window).scrollTop() < $(elem).height();
}

$(window).scroll(function() {

    if (isInView($('#user-experience')) && !hasReachedUserExperience) {
        hasReachedUserExperience = true;
        player.get(0).play();
    }

});

A simple boolean flag seems to meet your behavior requirements.

Upvotes: 2

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