Created
March 8, 2018 23:42
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promise vs await tests
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| <html> | |
| <head> | |
| <script> | |
| var args = { | |
| headers: new Headers({ | |
| 'Content-Type': 'text/plain' | |
| })}; | |
| async function useAwaits() { | |
| try { | |
| let resp = await fetch("https://en.wikipedia.org/w/api.php?action=opensearch&format=json&origin=*&search=stack&limit=10", args); | |
| return await resp.text(); | |
| } catch(e) { | |
| return e.message; | |
| } | |
| } | |
| function promisesOnly() { | |
| return fetch("https://en.wikipedia.org/w/api.php?action=opensearch&format=json&origin=*&search=stack&limit=10", args).then( | |
| (res) => {return res.text();}, | |
| (res) => {return res.message}); | |
| } | |
| function myPromise() { | |
| var p = new Promise((resolve, reject) => {resolve("welp");}); | |
| return p.then(res=>{return "welp number twooo";}); | |
| } | |
| useAwaits().then((res) => { | |
| console.log("awaits: " + JSON.stringify(res)); | |
| document.getElementById("awaits").innerHTML = res; | |
| }); | |
| promisesOnly().then((res) => { | |
| console.log("pure promises: " + JSON.stringify(res)); | |
| document.getElementById("promises").innerHTML = res; | |
| }); | |
| myPromise().then(res=>{console.log("mypromise:" + res);}) | |
| </script> | |
| <body> | |
| <h2>Awaits...</h2> | |
| <div id="awaits"></div> | |
| <h2>Promises...</h2> | |
| <div id="promises"></div> | |
| </body> | |
| </html> |
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