jsdk-offical/examples/jsan/tween_controls_seek.js

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JS.imports('$jsan').then(() => {
    let anim = new TweenAnim({
        keys: {
            translateX: function (el, i) {
                return 100 * (i + 1);
            }
        },
        direction: 'alternate',
        loop: true,
        duration: 10000
    }).targets($L('.el')), progressEl = $1('.progress');
    progressEl.on('input', function () {
        anim.seek(anim.config().duration * (parseFloat(this.value) / 100));
    });
});