Add on-device speech recognition demo #332
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,24 @@ | ||
| <!DOCTYPE html> | ||
| <html lang="en"> | ||
| <head> | ||
| <meta charset="utf-8" /> | ||
| <meta name="viewport" content="width=device-width" /> | ||
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| <title>On-device speech color changer</title> | ||
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| <link rel="stylesheet" href="style.css" /> | ||
| <script src="script.js" defer></script> | ||
| </head> | ||
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| <body> | ||
| <h1>On-device speech color changer</h1> | ||
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| <p>This demo works in Chrome 142+ on desktop and equivalent Chromiums.</p> | ||
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| <p class="hints"></p> | ||
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| <button>Start recognition</button> | ||
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| <p class="output"><em>...diagnostic messages</em></p> | ||
| </body> | ||
| </html> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| const colors = [ | ||
| "aqua", | ||
| "azure", | ||
| "bisque", | ||
| "blue", | ||
| "brown", | ||
| "chocolate", | ||
| "coral", | ||
| "cornflowerblue", | ||
| "crimson", | ||
| "cyan", | ||
| "deepskyblue", | ||
| "fuchsia", | ||
| "ghostwhite", | ||
| "gold", | ||
| "goldenrod", | ||
| "gray", | ||
| "green", | ||
| "greenyellow", | ||
| "hotpink", | ||
| "indigo", | ||
| "ivory", | ||
| "khaki", | ||
| "lavender", | ||
| "lightseagreen", | ||
| "lime", | ||
| "linen", | ||
| "magenta", | ||
| "maroon", | ||
| "moccasin", | ||
| "navy", | ||
| "olive", | ||
| "orange", | ||
| "orchid", | ||
| "peru", | ||
| "pink", | ||
| "plum", | ||
| "purple", | ||
| "rebeccapurple", | ||
| "red", | ||
| "salmon", | ||
| "sienna", | ||
| "silver", | ||
| "snow", | ||
| "steelblue", | ||
| "tan", | ||
| "teal", | ||
| "thistle", | ||
| "tomato", | ||
| "turquoise", | ||
| "violet", | ||
| "yellow", | ||
| ]; | ||
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| const phraseData = [ | ||
| { phrase: "azure", boost: 10.0 }, | ||
| { phrase: "khaki", boost: 3.0 }, | ||
| { phrase: "tan", boost: 2.0 }, | ||
| ]; | ||
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| const phraseObjects = phraseData.map( | ||
| (p) => new SpeechRecognitionPhrase(p.phrase, p.boost) | ||
| ); | ||
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| const recognition = new SpeechRecognition(); | ||
| recognition.continuous = false; | ||
| recognition.lang = "en-US"; | ||
| recognition.interimResults = false; | ||
| recognition.processLocally = true; | ||
| recognition.phrases = phraseObjects; | ||
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| recognition.phrases.push(new SpeechRecognitionPhrase("thistle", 5.0)); | ||
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| const diagnostic = document.querySelector(".output"); | ||
| const bg = document.querySelector("html"); | ||
| const hints = document.querySelector(".hints"); | ||
| const startBtn = document.querySelector("button"); | ||
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| let colorHTML = ""; | ||
| colors.forEach(function (v, i, a) { | ||
| console.log(v, i); | ||
| colorHTML += `<span style="background-color: ${v};">${v}</span> `; | ||
| }); | ||
| hints.innerHTML = `Press the button then say a color to change the background color of the app. For example, you could try ${colorHTML}`; | ||
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| startBtn.addEventListener("click", () => { | ||
| // check availability of target language | ||
| SpeechRecognition.available({ langs: ["en-US"], processLocally: true }).then( | ||
| (result) => { | ||
| if (result === "unavailable") { | ||
| diagnostic.textContent = `en-US not available to download at this time. Sorry!`; | ||
| } else if (result === "available") { | ||
| recognition.start(); | ||
| console.log("Ready to receive a color command."); | ||
| } else { | ||
| diagnostic.textContent = `en-US language pack downloading`; | ||
| SpeechRecognition.install({ | ||
| langs: ["en-US"], | ||
| processLocally: true, | ||
| }).then((result) => { | ||
| if (result) { | ||
| diagnostic.textContent = `en-US language pack downloaded. Try again.`; | ||
| } else { | ||
| diagnostic.textContent = `en-US language pack failed to download. Try again later.`; | ||
| } | ||
| }); | ||
| } | ||
| } | ||
| ); | ||
| }); | ||
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| recognition.addEventListener("result", (event) => { | ||
| let color = event.results[0][0].transcript; | ||
| // Remove whitespace from recognized speech | ||
| color = color.replace(/\s+/g, ""); | ||
| diagnostic.textContent = `Result received: ${color}.`; | ||
| bg.style.backgroundColor = color; | ||
| console.log(`Confidence: ${event.results[0][0].confidence}`); | ||
| }); | ||
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| recognition.addEventListener("speechend", () => { | ||
| recognition.stop(); | ||
| }); | ||
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| recognition.addEventListener("nomatch", (event) => { | ||
| diagnostic.textContent = "I didn't recognise that color."; | ||
| }); | ||
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| recognition.addEventListener("error", (event) => { | ||
| diagnostic.textContent = `Error occurred in recognition: ${event.error}`; | ||
| }); | ||
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| Original file line number | Diff line number | Diff line change | ||||||||||||||
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| @@ -0,0 +1,39 @@ | ||||||||||||||||
| body, | ||||||||||||||||
| html { | ||||||||||||||||
| margin: 0; | ||||||||||||||||
| } | ||||||||||||||||
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| html { | ||||||||||||||||
| height: 100%; | ||||||||||||||||
| } | ||||||||||||||||
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| body { | ||||||||||||||||
| height: inherit; | ||||||||||||||||
| overflow: hidden; | ||||||||||||||||
| max-width: 800px; | ||||||||||||||||
| margin: 0 auto; | ||||||||||||||||
| font-family: system-ui; | ||||||||||||||||
| text-align: center; | ||||||||||||||||
| } | ||||||||||||||||
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| .output { | ||||||||||||||||
| height: 100px; | ||||||||||||||||
| margin: 0; | ||||||||||||||||
| overflow: auto; | ||||||||||||||||
| position: absolute; | ||||||||||||||||
| bottom: 0; | ||||||||||||||||
| right: 0; | ||||||||||||||||
| left: 0; | ||||||||||||||||
| background-color: rgba(255 255 255 / 0.2); | ||||||||||||||||
| display: flex; | ||||||||||||||||
| justify-content: center; | ||||||||||||||||
| align-items: center; | ||||||||||||||||
| } | ||||||||||||||||
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| ul { | ||||||||||||||||
| margin: 0; | ||||||||||||||||
| } | ||||||||||||||||
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| .hints span { | ||||||||||||||||
| text-shadow: 0px 0px 6px rgba(255 255 255 / 0.7); | ||||||||||||||||
| } | ||||||||||||||||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,62 +1,98 @@ | ||
| var SpeechRecognition = SpeechRecognition || webkitSpeechRecognition; | ||
| var SpeechRecognitionEvent = | ||
| SpeechRecognitionEvent || webkitSpeechRecognitionEvent; | ||
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| var colors = [ | ||
| "aqua", | ||
| "azure", | ||
| "beige", | ||
| "bisque", | ||
| "black", | ||
| "blue", | ||
| "brown", | ||
| "chocolate", | ||
| "coral", | ||
| "crimson", | ||
| "cyan", | ||
| "fuchsia", | ||
| "ghostwhite", | ||
| "gold", | ||
| "goldenrod", | ||
| "gray", | ||
| "green", | ||
| "indigo", | ||
| "ivory", | ||
| "khaki", | ||
| "lavender", | ||
| "lime", | ||
| "linen", | ||
| "magenta", | ||
| "maroon", | ||
| "moccasin", | ||
| "navy", | ||
| "olive", | ||
| "orange", | ||
| "orchid", | ||
| "peru", | ||
| "pink", | ||
| "plum", | ||
| "purple", | ||
| "red", | ||
| "salmon", | ||
| "sienna", | ||
| "silver", | ||
| "snow", | ||
| "tan", | ||
| "teal", | ||
| "thistle", | ||
| "tomato", | ||
| "turquoise", | ||
| "violet", | ||
| "white", | ||
| "yellow", | ||
| ]; | ||
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| const recognition = new SpeechRecognition(); | ||
| recognition.continuous = false; | ||
| recognition.lang = "en-US"; | ||
| recognition.interimResults = false; | ||
| recognition.maxAlternatives = 1; | ||
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| const diagnostic = document.querySelector(".output"); | ||
| const bg = document.querySelector("html"); | ||
| const hints = document.querySelector(".hints"); | ||
| const startBtn = document.querySelector("button"); | ||
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| let colorHTML = ""; | ||
| colors.forEach(function (v, i, a) { | ||
| console.log(v, i); | ||
| colorHTML += '<span style="background-color:' + v + ';"> ' + v + " </span>"; | ||
| }); | ||
| hints.innerHTML = | ||
| "Press the button then say a color to change the background color of the app. Try " + | ||
| colorHTML + | ||
| "."; | ||
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| startBtn.onclick = function () { | ||
| recognition.start(); | ||
| console.log("Ready to receive a color command."); | ||
| }; | ||
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| recognition.onresult = function (event) { | ||
| const color = event.results[0][0].transcript; | ||
| diagnostic.textContent = "Result received: " + color + "."; | ||
| bg.style.backgroundColor = color; | ||
| console.log("Confidence: " + event.results[0][0].confidence); | ||
| }; | ||
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| recognition.onspeechend = function () { | ||
| recognition.stop(); | ||
| }; | ||
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| recognition.onnomatch = function (event) { | ||
| diagnostic.textContent = "I didn't recognise that color."; | ||
| }; | ||
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| recognition.onerror = function (event) { | ||
| diagnostic.textContent = "Error occurred in recognition: " + event.error; | ||
| }; |
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I would suggest using buttons to make the demo accessible for keyboard users.
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I don't want to change all of these into buttons; they are supposed to be hint text, not controls. I've fixed the keyboard accessibility issue by instead adding a single button to the DOM, and then starting the speech recognition when that is pressed. I've also updated the text description to suit.
I've done this in both versions of the color changer demo.