{"id":6444,"date":"2024-01-11T16:40:00","date_gmt":"2024-01-11T16:40:00","guid":{"rendered":"https:\/\/codehim.com\/?p=6444"},"modified":"2024-01-22T14:44:03","modified_gmt":"2024-01-22T09:44:03","slug":"speedometer-code-in-javascript","status":"publish","type":"post","link":"https:\/\/codehim.com\/vanilla-javascript\/speedometer-code-in-javascript\/","title":{"rendered":"Speedometer Code in JavaScript"},"content":{"rendered":"

This JavaScript code snippet helps you to create an animated speedometer to indicate speed. The speedometer display speed in both analog and digital format. The interface is inspired by the Tesla speedometer that is built with HTML5 canvas and JavaScript. You can set a custom speed and change the size of the speedometer according to your needs.<\/p>\n

How to Create Speedometer in JavaScript<\/h2>\n

1. First of all, create a canvas element with an id “canvas” and place it where you want to display the speedometer.<\/p>\n

  <canvas id=\"canvas\"><\/canvas><\/pre>\n
2. After that, define the CSS styles for the canvas element as follows:<\/p>\n
canvas {\r\n  margin: 0 auto;\r\n  display: block;\r\n}<\/pre>\n
3. Finally, add the following JavaScript code and done.<\/p>\n
'use strict';\r\n\/*\r\n* TESLA HUD BY Tameem Imamdad timamdad@hawk.iit.edu\r\nGitHub: https:\/\/github.com\/tameemi\/tesla-speedometer\r\n*\/\r\n\r\nlet dev = false;\r\n\/\/let t0 = 0;\r\n\/\/let t1 = 0;\r\n\r\n     var c = document.getElementById(\"canvas\");\r\n        c.width = 500;\r\n        c.height = 500;\r\n\r\n        var ctx = c.getContext(\"2d\");\r\n\r\n        \/\/Rescale the size\r\n        ctx.scale(1,1);\r\n\r\n        var speedGradient = ctx.createLinearGradient(0, 500, 0, 0);\r\n        speedGradient.addColorStop(0, '#00b8fe');\r\n        speedGradient.addColorStop(1, '#41dcf4');\r\n\r\n        var rpmGradient = ctx.createLinearGradient(0, 500, 0, 0);\r\n        rpmGradient.addColorStop(0, '#f7b733');\r\n        rpmGradient.addColorStop(1, '#fc4a1a');\r\n        \/\/rpmGradient.addColorStop(1, '#EF4836');\r\n\r\n        function speedNeedle(rotation) {\r\n            ctx.lineWidth = 2;\r\n\r\n            ctx.save();\r\n            ctx.translate(250, 250);\r\n            ctx.rotate(rotation);\r\n            ctx.strokeRect(-130 \/ 2 + 170, -1 \/ 2, 135, 1);\r\n            ctx.restore();\r\n\r\n            rotation += Math.PI \/ 180;\r\n        }\r\n\r\n        function rpmNeedle(rotation) {\r\n            ctx.lineWidth = 2;\r\n\r\n            ctx.save();\r\n            ctx.translate(250, 250);\r\n            ctx.rotate(rotation);\r\n            ctx.strokeRect(-130 \/ 2 + 170, -1 \/ 2, 135, 1);\r\n            ctx.restore();\r\n\r\n            rotation += Math.PI \/ 180;\r\n        }\r\n\r\n        function drawMiniNeedle(rotation, width, speed) {\r\n            ctx.lineWidth = width;\r\n\r\n            ctx.save();\r\n            ctx.translate(250, 250);\r\n            ctx.rotate(rotation);\r\n            ctx.strokeStyle = \"#333\";\r\n            ctx.fillStyle = \"#333\";\r\n            ctx.strokeRect(-20 \/ 2 + 220, -1 \/ 2, 20, 1);\r\n            ctx.restore();\r\n\r\n            let x = (250 + 180 * Math.cos(rotation));\r\n            let y = (250 + 180 * Math.sin(rotation));\r\n\r\n            ctx.font = \"700 20px Open Sans\";\r\n            ctx.fillText(speed, x, y);\r\n\r\n            rotation += Math.PI \/ 180;\r\n        }\r\n\r\n        function calculateSpeedAngle(x, a, b) {\r\n            let degree = (a - b) * (x) + b;\r\n            let radian = (degree * Math.PI) \/ 180;\r\n            return radian <= 1.45 ? radian : 1.45;\r\n        }\r\n\r\n        function calculateRPMAngel(x, a, b) {\r\n            let degree = (a - b) * (x) + b;\r\n            let radian = (degree * Math.PI) \/ 180;\r\n            return radian >= -0.46153862656807704 ? radian : -0.46153862656807704;\r\n        }\r\n\r\n        function drawSpeedo(speed, gear, rpm, topSpeed) {\r\n            if (speed == undefined) {\r\n                return false;\r\n            } else {\r\n                speed = Math.floor(speed);\r\n                rpm = rpm * 10;\r\n            }\r\n\r\n            ctx.clearRect(0, 0, 500, 500);\r\n\r\n            ctx.beginPath();\r\n            ctx.fillStyle = 'rgba(0, 0, 0, .9)';\r\n            ctx.arc(250, 250, 240, 0, 2 * Math.PI);\r\n            ctx.fill();\r\n            ctx.save()\r\n            ctx.restore();\r\n            ctx.fillStyle = \"#FFF\";\r\n            ctx.stroke();\r\n\r\n            ctx.beginPath();\r\n            ctx.strokeStyle = \"#333\";\r\n            ctx.lineWidth = 10;\r\n            ctx.arc(250, 250, 100, 0, 2 * Math.PI);\r\n            ctx.stroke();\r\n\r\n            ctx.beginPath();\r\n            ctx.lineWidth = 1;\r\n            ctx.arc(250, 250, 240, 0, 2 * Math.PI);\r\n            ctx.stroke();\r\n\r\n            ctx.font = \"700 70px Open Sans\";\r\n            ctx.textAlign = \"center\";\r\n            ctx.fillText(speed, 250, 220);\r\n\r\n            ctx.font = \"700 15px Open Sans\";\r\n            ctx.fillText(\"mph\", 250, 235);\r\n\r\n            if (gear == 0 && speed > 0) {\r\n                ctx.fillStyle = \"#999\";\r\n                ctx.font = \"700 70px Open Sans\";\r\n                ctx.fillText('R', 250, 460);\r\n\r\n                ctx.fillStyle = \"#333\";\r\n                ctx.font = \"50px Open Sans\";\r\n                ctx.fillText('N', 290, 460);\r\n            } else if (gear == 0 && speed == 0) {\r\n                ctx.fillStyle = \"#999\";\r\n                ctx.font = \"700 70px Open Sans\";\r\n                ctx.fillText('N', 250, 460);\r\n\r\n                ctx.fillStyle = \"#333\";\r\n                ctx.font = \"700 50px Open Sans\";\r\n                ctx.fillText('R', 210, 460);\r\n\r\n                ctx.font = \"700 50px Open Sans\";\r\n                ctx.fillText(parseInt(gear) + 1, 290, 460);\r\n            } else if (gear - 1 <= 0) {\r\n                ctx.fillStyle = \"#999\";\r\n                ctx.font = \"700 70px Open Sans\";\r\n                ctx.fillText(gear, 250, 460);\r\n\r\n                ctx.fillStyle = \"#333\";\r\n                ctx.font = \"50px Open Sans\";\r\n                ctx.fillText('R', 210, 460);\r\n\r\n                ctx.font = \"700 50px Open Sans\";\r\n                ctx.fillText(parseInt(gear) + 1, 290, 460);\r\n            } else {\r\n                ctx.font = \"700 70px Open Sans\";\r\n                ctx.fillStyle = \"#999\";\r\n                ctx.fillText(gear, 250, 460);\r\n\r\n                ctx.font = \"700 50px Open Sans\";\r\n                ctx.fillStyle = \"#333\";\r\n                ctx.fillText(gear - 1, 210, 460);\r\n                if (parseInt(gear) + 1 < 7) {\r\n                    ctx.font = \"700 50px Open Sans\";\r\n                    ctx.fillText(parseInt(gear) + 1, 290, 460);\r\n                }\r\n            }\r\n\r\n            ctx.fillStyle = \"#FFF\";\r\n            for (var i = 10; i <= Math.ceil(topSpeed \/ 20) * 20; i += 10) {\r\n                console.log();\r\n                drawMiniNeedle(calculateSpeedAngle(i \/ topSpeed, 83.07888, 34.3775) * Math.PI, i % 20 == 0 ? 3 : 1, i%20 == 0 ? i : '');\r\n                \r\n                if(i<=100) { \r\n                    drawMiniNeedle(calculateSpeedAngle(i \/ 47, 0, 22.9183) * Math.PI, i % 20 == 0 ? 3 : 1, i % 20 ==\r\n                    0 ?\r\n                    i \/ 10 : '');\r\n                }\r\n            }\r\n\r\n            ctx.beginPath();\r\n            ctx.strokeStyle = \"#41dcf4\";\r\n            ctx.lineWidth = 25;\r\n            ctx.shadowBlur = 20;\r\n            ctx.shadowColor = \"#00c6ff\";\r\n\r\n            ctx.strokeStyle = speedGradient;\r\n            ctx.arc(250, 250, 228, .6 * Math.PI, calculateSpeedAngle(speed \/ topSpeed, 83.07888, 34.3775) * Math.PI);\r\n            ctx.stroke();\r\n            ctx.beginPath();\r\n            ctx.lineWidth = 25;\r\n            ctx.strokeStyle = rpmGradient;\r\n            ctx.shadowBlur = 20;\r\n            ctx.shadowColor = \"#f7b733\";\r\n\r\n            ctx.arc(250, 250, 228, .4 * Math.PI, calculateRPMAngel(rpm \/ 4.7, 0, 22.9183) * Math.PI, true);\r\n            ctx.stroke();\r\n            ctx.shadowBlur = 0;\r\n\r\n\r\n            ctx.strokeStyle = '#41dcf4';\r\n            speedNeedle(calculateSpeedAngle(speed \/ topSpeed, 83.07888, 34.3775) * Math.PI);\r\n\r\n            ctx.strokeStyle = rpmGradient;\r\n            rpmNeedle(calculateRPMAngel(rpm \/ 4.7, 0, 22.9183) * Math.PI);\r\n\r\n            ctx.strokeStyle = \"#000\";\r\n        }\r\n\r\n\r\nfunction setSpeed () {\r\n  let speedM = 0;\r\n  let gear = 0;\r\n  let rpm = 0;\r\n   setInterval(function(){\r\n     if (speedM > 160){\r\n        speedM = 0;\r\n        rpm = 0;\r\n      }\r\n     if (speedM > 1 && speedM< 30){\r\n       gear = 1;\r\n     } else if (speedM > 30 && speedM < 50) {\r\n       gear = 2;\r\n          } else if (speedM > 50 &&   speedM < 70) {\r\n       gear = 3;\r\n     } else if (speedM > 70 &&   speedM < 100)      {\r\n       gear = 4;\r\n          } else if (speedM > 100)      {\r\n       gear = 5;\r\n     }\r\n     \r\n     speedM++;\r\n     if (rpm < 1){\r\n      rpm += .03; \r\n     }\r\n        drawSpeedo(speedM,gear,rpm,160);\r\n\r\n   }, 40);\r\n  \r\n}\r\n\r\ndocument.addEventListener('DOMContentLoaded', function() {\r\n\r\n    \/\/setInterval(setSpeed, 2000)\r\n    \/\/renderCanvas();\r\n  setSpeed();\r\n    \/\/drawSpeedo(120,4,.8,160);\r\n}, false);<\/pre>\n
That’s all! hopefully, you have successfully integrated this speedometer code snippet into your project. If you have any questions or facing any issues, feel free to comment below.<\/p>\n","protected":false},"excerpt":{"rendered":"
This JavaScript code snippet helps you to create an animated speedometer to indicate speed. The speedometer display speed in both…<\/p>\n","protected":false},"author":1,"featured_media":6463,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[116],"tags":[],"class_list":["post-6444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vanilla-javascript"],"acf":[],"yoast_head":"\nSpeedometer Code in JavaScript — CodeHim<\/title>\n<meta name=\"description\" content=\"Here is a lightweight JavaScript code snippet to create a speedometer with HTML5 canvas. You can view demo and download code.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/codehim.com\/vanilla-javascript\/speedometer-code-in-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Speedometer Code in JavaScript — CodeHim\" \/>\n<meta property=\"og:description\" content=\"Here is a lightweight JavaScript code snippet to create a speedometer with HTML5 canvas. 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