skimmer.js

Dependency-free JavaScript library to detect when a user is skimming the a page. See demo.

Install

npm i skimmer --save or grab the js file above.

Basic usage

skimmer({
    trigger: function() {
        console.log('skimming detected')
    }
})

Advanced usage

skimmer({
    trigger: function(data) {
        console.log('skimming detected')
    },
    rate: 700,
    delay: 4,
    multiple: true,
    update: function(data) {
        console.log(data)
    }
})

Options

trigger: [function] required

Callback function that fires when skimming is detected

rate: [number] optional (defaults to 500)

Minimum rate (pixels / second) needed to trigger

delay: [number] optional (seconds, defaults to 2)

How long to wait for consistent downward progress before allowing trigger

multiple: [boolean] optional (defaults to false)

Whether to fire one or infinite skim detection triggers

update: [function] optional

Callback function that fires on scroll with skimmer progress data