How to activate in php theme not as shortcode

i tried the sample codes here but it didn’t work..
http://iamceege.github.io/tooltipster/

<img src="xxxxxxx.jpg" class="tooltip" title="This is my image's tooltip message!" />

<script>
$(document).ready(function() {
$('.tooltip').tooltipster();
});
</script>

how do i activate anything with “tooltip” in the class?

https://wordpress.org/plugins/tooltipster/