Package Exports

enter-view

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Readme

enter-view.js

Dependency-free JavaScript library to detect when element enters into view. See demo.

Usage

enterView({
    selector: '.class-name',
    trigger: function(el) {
        el.classList.add('entered');
    }
});

enterView({
    selector: '.class-name',
    trigger: function(el) {
        el.classList.add('entered');
    },
    offset: 0.5, // trigger at middle of viewport
    once: false, // trigger every time
});

Options

selector: [string or array of elements] required

Takes a class, id, or array of dom elements.

trigger: [function] required

Callback function that returns the element that was triggered.

offset: [number] optional (defaults to 0)

A value from 0 to 1 of how far from the bottom of the viewport to offset the trigger by. 0 = top of element crosses bottom of viewport (enters screen from bottom), 1 = top of element crosses top of viewport (exits screen top).

once: [boolean] optional (defaults to true)

Whether or not to trigger the callback once or every time.