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okay so today i want to talk about the history api and specifically two methods from the history api push state and replace state so weamp;#39;ve got these two methods and both of them have the same signature thereamp;#39;s a state property a title property and an optional url so what do these things do well iamp;#39;m sure youamp;#39;ve used the history buttons the forward and back arrows in your browser before in chrome we press and hold we can see this is the history array for this page now right now thereamp;#39;s only one entry there was the new tab that when i clicked the plus button i created a new tab or ctrl t command t to open up a new tab then i pasted in a url and i loaded it so iamp;#39;ve got my current page and then one entry in the history array every time you add a new page so if i navigated someplace else i would be adding things into this history array well push state and replace state allow us to manage that array without actually clicking on a link without ac