1 00:00:00,000 --> 00:00:04,000 So what's an intercepting route? 2 00:00:04,000 --> 00:00:08,000 Well, an intercepting route is an alternative route, 3 00:00:08,000 --> 00:00:12,000 which sometimes gets activated depending on 4 00:00:12,000 --> 00:00:14,000 whether you are navigating to it 5 00:00:14,000 --> 00:00:18,000 through an internal link from within the page. 6 00:00:18,000 --> 00:00:21,000 So if you're in that single page application mode 7 00:00:21,000 --> 00:00:24,000 and you're navigating around on the page, 8 00:00:24,000 --> 00:00:27,000 or you are coming from an external link, 9 00:00:27,000 --> 00:00:31,000 or you manually enter the URL or you reloaded the page 10 00:00:31,000 --> 00:00:35,000 so that for the same path, different pages are shown 11 00:00:35,000 --> 00:00:37,000 depending on how you got there. 12 00:00:38,000 --> 00:00:41,000 That's the idea behind an intercepting route 13 00:00:41,000 --> 00:00:46,000 because the intercepting route essentially intercepts 14 00:00:46,000 --> 00:00:49,000 an internal navigation request 15 00:00:49,000 --> 00:00:52,000 and instead of showing the page you would see 16 00:00:52,000 --> 00:00:55,000 if you would reload the page or come to the page 17 00:00:55,000 --> 00:01:00,000 from outside the website, a different page will be shown. 18 00:01:01,000 --> 00:01:04,000 And I'll show that here at the example of this image page. 19 00:01:05,000 --> 00:01:08,000 Currently we have just one page here, 20 00:01:08,000 --> 00:01:12,000 and therefore whenever I view the details of an image, 21 00:01:12,000 --> 00:01:13,000 I see this page. 22 00:01:13,000 --> 00:01:17,000 No matter if I got there by clicking on that image 23 00:01:17,000 --> 00:01:19,000 or if I got there by reloading the page, 24 00:01:19,000 --> 00:01:21,000 I always see the same page. 25 00:01:22,000 --> 00:01:24,000 Now, if I wanted to change this, 26 00:01:24,000 --> 00:01:27,000 I could set up such a intercepting route 27 00:01:27,000 --> 00:01:31,000 by creating a sibling folder to the page 28 00:01:31,000 --> 00:01:34,000 I want to intercept though, that's not a hard requirement, 29 00:01:34,000 --> 00:01:35,000 as you'll see in a second. 30 00:01:36,000 --> 00:01:40,000 And by then, giving it a name that starts with opening 31 00:01:40,000 --> 00:01:42,000 and closing parentheses, 32 00:01:42,000 --> 00:01:45,000 so not square bracket or anything like that, 33 00:01:45,000 --> 00:01:48,000 but instead regular parentheses. 34 00:01:48,000 --> 00:01:52,000 And then after those parentheses, you repeat the name 35 00:01:52,000 --> 00:01:56,000 of the path of the route you want to intercept. 36 00:01:56,000 --> 00:01:59,000 So if I wanna intercept the image route here, 37 00:01:59,000 --> 00:02:02,000 I have to add image after those parentheses. 38 00:02:03,000 --> 00:02:07,000 And then between those parentheses, you basically have 39 00:02:07,000 --> 00:02:12,000 to describe the path from this folder 40 00:02:12,000 --> 00:02:15,000 and the path segment it represents 41 00:02:15,000 --> 00:02:18,000 to the segment that should be intercepted. 42 00:02:18,000 --> 00:02:20,000 So having the same name is not enough. 43 00:02:20,000 --> 00:02:22,000 Instead, you also must describe the path 44 00:02:22,000 --> 00:02:25,000 to get to that related folder. 45 00:02:25,000 --> 00:02:28,000 And here, if it's in the same folder, that would be achieved 46 00:02:28,000 --> 00:02:29,000 by adding a single dot. 47 00:02:31,000 --> 00:02:33,000 Just as in a import path, 48 00:02:33,000 --> 00:02:37,000 if you wanna import something from the same folder, 49 00:02:37,000 --> 00:02:39,000 you could do that with ./ 50 00:02:39,000 --> 00:02:43,000 and then the name of the file that is in the same folder. 51 00:02:43,000 --> 00:02:47,000 Now, if that intercepting route here would be set up 52 00:02:47,000 --> 00:02:51,000 in some nested path folder, you would have to add 53 00:02:51,000 --> 00:02:54,000 two dots here to go up one level. 54 00:02:54,000 --> 00:02:56,000 Just as in an import, 55 00:02:56,000 --> 00:02:59,000 if you need to go up one level to reach the file 56 00:02:59,000 --> 00:03:03,000 you want to import from, you have to add two dots. 57 00:03:03,000 --> 00:03:05,000 Now, this import thing was just an example, 58 00:03:05,000 --> 00:03:06,000 but that is how you need to configure 59 00:03:06,000 --> 00:03:09,000 this intercepting route folder name. 60 00:03:09,000 --> 00:03:13,000 And of course, as always, you find all the details 61 00:03:13,000 --> 00:03:16,000 in the official documentation and there you also see 62 00:03:16,000 --> 00:03:19,000 how that would change if you would need to go up 63 00:03:19,000 --> 00:03:22,000 multiple folder segments and so on. 64 00:03:22,000 --> 00:03:25,000 But it's pretty common that you're in the same folder, 65 00:03:25,000 --> 00:03:27,000 so that's probably the most important notation 66 00:03:27,000 --> 00:03:31,000 you should memorize, having this notation here. 67 00:03:32,000 --> 00:03:35,000 Well, now the idea is that you add a page.js file in there, 68 00:03:35,000 --> 00:03:38,000 and now you define the page as it should be shown 69 00:03:38,000 --> 00:03:41,000 if the navigation request was intercepted. 70 00:03:41,000 --> 00:03:45,000 So if a user tried to visit this specific route 71 00:03:45,000 --> 00:03:48,000 whilst already being on the website. 72 00:03:48,000 --> 00:03:52,000 And for that here, I'll actually copy and paste the code 73 00:03:52,000 --> 00:03:56,000 from the other image page.js file, 74 00:03:56,000 --> 00:03:59,000 and maybe name this intercepted image page 75 00:03:59,000 --> 00:04:04,000 and to see the difference here, I'll add an H2 element 76 00:04:04,000 --> 00:04:07,000 above that diff, where I'll say intercepted 77 00:04:07,000 --> 00:04:09,000 and wrap that all in a fragment. 78 00:04:09,000 --> 00:04:11,000 And we'll make this more useful soon. 79 00:04:11,000 --> 00:04:14,000 For the moment, I'll just add this so that we can see 80 00:04:14,000 --> 00:04:16,000 on which page we are, 81 00:04:17,000 --> 00:04:20,000 because now with those changes made, if you go back 82 00:04:20,000 --> 00:04:24,000 and you reload, you see there is no intercepted text here. 83 00:04:25,000 --> 00:04:29,000 But if I go to a news and I click on the image, 84 00:04:29,000 --> 00:04:32,000 this text is there, and again, if I reload, it's not there. 85 00:04:32,000 --> 00:04:35,000 So we see different content, 86 00:04:35,000 --> 00:04:39,000 we actually get a different page.js file being loaded 87 00:04:39,000 --> 00:04:41,000 depending on how we got to this page 88 00:04:41,000 --> 00:04:46,000 and that's exactly the idea behind intercepting routes. 89 00:04:46,000 --> 00:04:48,000 Now, this can sometimes be useful, 90 00:04:48,000 --> 00:04:52,000 but it's especially a useful feature when combined 91 00:04:52,000 --> 00:04:56,000 with parallel routes to, for example, 92 00:04:56,000 --> 00:05:00,000 show the content in a modal if it's intercepted 93 00:05:00,000 --> 00:05:05,000 or as a full screen page if you came there by reloading 94 00:05:05,000 --> 00:05:09,000 or entering the link manually and that's what we'll do next.