var Component=(()=>{var h=Object.create;var t=Object.defineProperty;var m=Object.getOwnPropertyDescriptor;var u=Object.getOwnPropertyNames;var N=Object.getPrototypeOf,k=Object.prototype.hasOwnProperty;var o=a=>t(a,"__esModule",{value:!0});var g=(a,s)=>()=>(s||a((s={exports:{}}).exports,s),s.exports),f=(a,s)=>{o(a);for(var c in s)t(a,c,{get:s[c],enumerable:!0})},y=(a,s,c)=>{if(s&&typeof s=="object"||typeof s=="function")for(let e of u(s))!k.call(a,e)&&e!=="default"&&t(a,e,{get:()=>s[e],enumerable:!(c=m(s,e))||c.enumerable});return a},b=a=>y(o(t(a!=null?h(N(a)):{},"default",a&&a.__esModule&&"default"in a?{get:()=>a.default,enumerable:!0}:{value:a,enumerable:!0})),a);var p=g((B,r)=>{r.exports=_jsx_runtime});var T={};f(T,{default:()=>x,frontmatter:()=>v});var n=b(p()),v={title:"Balloon Slider Control in React Native",date:"2023-02-22",lastmod:"2023-02-22",tags:["react-native","react","reanimated","gesture-handler","react-native-skia"],draft:!1,layout:"PostLayout",accessCode:"3a219e3e1b4259b1c19355d1185fb100211942f6597a4316676b60aaad4b9b5e",vimeoId:"800258699"};function w(a={}){let{wrapper:s}=a.components||{};return s?(0,n.jsx)(s,Object.assign({},a,{children:(0,n.jsx)(c,{})})):c();function c(){let e=Object.assign({h2:"h2",a:"a",span:"span",p:"p",h3:"h3",strong:"strong",pre:"pre",code:"code",ol:"ol",li:"li",ul:"ul"},a.components),{VideoPlayer:l,WarningBanner:i}=e;return l||d("VideoPlayer",!0),i||d("WarningBanner",!0),(0,n.jsxs)(n.Fragment,{children:[(0,n.jsxs)(e.h2,{id:"introduction",children:[(0,n.jsx)(e.a,{"aria-hidden":"true",tabIndex:"-1",href:"#introduction",children:(0,n.jsx)(e.span,{className:"icon icon-link"})}),"Introduction"]}),` `,(0,n.jsxs)(e.p,{children:[`What's up mobile devs? I hope you're doing well. Today I want to share with you an animation that has always astonished me. It's a slider control that looks like a balloon. The animation has been created by `,(0,n.jsx)(e.a,{href:"https://cuberto.com/",children:"Cuberto Team"}),"."]}),` `,(0,n.jsxs)(e.p,{children:["You can find the original animation on ",(0,n.jsx)(e.a,{href:"https://dribbble.com/shots/6549207-Balloon-Slider-Control",children:"Dribbble"}),"."]}),` `,(0,n.jsx)(l,{video:a.vimeoId}),` `,(0,n.jsx)(e.p,{children:"As usual, I recommend to read this article with the code open in your editor."}),` `,(0,n.jsxs)(e.h3,{id:"dependencies",children:[(0,n.jsx)(e.a,{"aria-hidden":"true",tabIndex:"-1",href:"#dependencies",children:(0,n.jsx)(e.span,{className:"icon icon-link"})}),"Dependencies"]}),` `,(0,n.jsxs)(e.p,{children:["The component is composed of several sub-components imported from various libraries, including ",(0,n.jsx)(e.strong,{children:"@shopify/react-native-skia"}),", ",(0,n.jsx)(e.strong,{children:"react-native-gesture-handler"}),", and ",(0,n.jsx)(e.strong,{children:"react-native-reanimated"}),". 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We use the ",(0,n.jsx)(e.strong,{children:"ReText"})," component from ",(0,n.jsx)(e.strong,{children:"react-native-redash"})," to render the Text component."]}),` `,(0,n.jsx)("div",{className:"remark-code-title",children:"src/components/slider.tsx"}),` `,(0,n.jsx)(e.pre,{className:"language-tsx",children:(0,n.jsxs)(e.code,{className:"language-tsx code-highlight",children:[(0,n.jsxs)(e.span,{className:"code-line",children:[(0,n.jsx)(e.span,{className:"token spread operator",children:"..."}),` `]}),(0,n.jsx)(e.span,{className:"code-line",children:` `}),(0,n.jsxs)(e.span,{className:"code-line",children:[(0,n.jsx)(e.span,{className:"token keyword",children:"const"})," rBalloonText ",(0,n.jsx)(e.span,{className:"token operator",children:"="})," ",(0,n.jsx)(e.span,{className:"token function",children:"useDerivedValue"}),(0,n.jsx)(e.span,{className:"token punctuation",children:"("}),(0,n.jsx)(e.span,{className:"token punctuation",children:"("}),(0,n.jsx)(e.span,{className:"token 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punctuation",children:","})," sliderWidth",(0,n.jsx)(e.span,{className:"token punctuation",children:"]"}),(0,n.jsx)(e.span,{className:"token punctuation",children:","}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsx)(e.span,{className:"token punctuation",children:"["}),"minValue",(0,n.jsx)(e.span,{className:"token punctuation",children:","})," maxValue",(0,n.jsx)(e.span,{className:"token punctuation",children:"]"}),(0,n.jsx)(e.span,{className:"token punctuation",children:","}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsx)(e.span,{className:"token maybe-class-name",children:"Extrapolate"}),(0,n.jsx)(e.span,{className:"token punctuation",children:"."}),(0,n.jsx)(e.span,{className:"token constant",children:"CLAMP"}),(0,n.jsx)(e.span,{className:"token punctuation",children:","}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsx)(e.span,{className:"token punctuation",children:")"}),(0,n.jsx)(e.span,{className:"token punctuation",children:";"}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsx)(e.span,{className:"token keyword",children:"return"})," ",(0,n.jsxs)(e.span,{className:"token template-string",children:[(0,n.jsx)(e.span,{className:"token template-punctuation string",children:"`"}),(0,n.jsxs)(e.span,{className:"token interpolation",children:[(0,n.jsx)(e.span,{className:"token interpolation-punctuation punctuation",children:"${"}),"Math",(0,n.jsx)(e.span,{className:"token punctuation",children:"."}),(0,n.jsx)(e.span,{className:"token function",children:"floor"}),(0,n.jsx)(e.span,{className:"token punctuation",children:"("}),"interpolatedValue",(0,n.jsx)(e.span,{className:"token punctuation",children:")"}),(0,n.jsx)(e.span,{className:"token interpolation-punctuation punctuation",children:"}"})]}),(0,n.jsx)(e.span,{className:"token template-punctuation string",children:"`"})]}),(0,n.jsx)(e.span,{className:"token punctuation",children:";"}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[(0,n.jsx)(e.span,{className:"token punctuation",children:"}"}),(0,n.jsx)(e.span,{className:"token punctuation",children:","})," ",(0,n.jsx)(e.span,{className:"token punctuation",children:"["}),(0,n.jsx)(e.span,{className:"token punctuation",children:"]"}),(0,n.jsx)(e.span,{className:"token punctuation",children:")"}),(0,n.jsx)(e.span,{className:"token punctuation",children:";"}),` `]}),(0,n.jsx)(e.span,{className:"code-line",children:` `}),(0,n.jsxs)(e.span,{className:"code-line",children:[(0,n.jsx)(e.span,{className:"token spread operator",children:"..."}),` `]}),(0,n.jsx)(e.span,{className:"code-line",children:` `}),(0,n.jsxs)(e.span,{className:"code-line",children:[(0,n.jsx)(e.span,{className:"token keyword",children:"return"})," ",(0,n.jsx)(e.span,{className:"token punctuation",children:"("}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsx)(e.span,{className:"token spread operator",children:"..."}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsxs)(e.span,{className:"token tag",children:[(0,n.jsxs)(e.span,{className:"token tag",children:[(0,n.jsx)(e.span,{className:"token punctuation",children:"<"}),(0,n.jsx)(e.span,{className:"token class-name",children:"ReText"})]})," ",(0,n.jsx)(e.span,{className:"token attr-name",children:"text"}),(0,n.jsxs)(e.span,{className:"token script language-javascript",children:[(0,n.jsx)(e.span,{className:"token script-punctuation punctuation",children:"="}),(0,n.jsx)(e.span,{className:"token punctuation",children:"{"}),"rBalloonText",(0,n.jsx)(e.span,{className:"token punctuation",children:"}"})]})," ",(0,n.jsx)(e.span,{className:"token attr-name",children:"style"}),(0,n.jsxs)(e.span,{className:"token script language-javascript",children:[(0,n.jsx)(e.span,{className:"token script-punctuation punctuation",children:"="}),(0,n.jsx)(e.span,{className:"token punctuation",children:"{"}),"styles",(0,n.jsx)(e.span,{className:"token punctuation",children:"."}),(0,n.jsx)(e.span,{className:"token property-access",children:"balloonText"}),(0,n.jsx)(e.span,{className:"token punctuation",children:"}"})]})," ",(0,n.jsx)(e.span,{className:"token punctuation",children:"/>"})]}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[" ",(0,n.jsx)(e.span,{className:"token spread operator",children:"..."}),` `]}),(0,n.jsxs)(e.span,{className:"code-line",children:[(0,n.jsx)(e.span,{className:"token punctuation",children:")"}),` `]})]})}),` `,(0,n.jsxs)(e.p,{children:["This code defines a ",(0,n.jsx)(e.strong,{children:"useDerivedValue"})," hook that calculates a value to be displayed on a ReText component."]}),` `,(0,n.jsx)(e.p,{children:"The useDerivedValue hook takes a function that returns a derived value that will be updated whenever one of its dependencies changes. In this case, the function calculates the interpolated value based on the position of a slider."}),` `,(0,n.jsxs)(e.p,{children:["The interpolate function is used to map the value of balloonSliderX (which represents the position of the slider) from a range of ",(0,n.jsx)(e.strong,{children:"[0, sliderWidth]"})," to a range of ",(0,n.jsx)(e.strong,{children:"[minValue, maxValue]"}),". Extrapolate.CLAMP is used to limit the output value to be within the range of ",(0,n.jsx)(e.strong,{children:"[minValue, maxValue]"}),"."]}),` `,(0,n.jsx)(e.p,{children:"The interpolated value is then converted to a string with Math.floor, and the result is returned from the useDerivedValue hook."}),` `,(0,n.jsxs)(e.p,{children:["Finally, the derived value ",(0,n.jsx)(e.strong,{children:"rBalloonText"})," is rendered in a ",(0,n.jsx)(e.strong,{children:"ReText"})," component with the text prop."]}),` `,(0,n.jsx)(i,{type:"warning",title:"ReText vs AnimateableText",subtitle:"Since I've created the project with Expo Go, I've used the ReText component from react-native-redash. If you can support native modules, I really recommend to use the AnimateableText from https://www.npmjs.com/package/react-native-animateable-text for this specific use case."}),` `,(0,n.jsxs)(e.h2,{id:"conclusion",children:[(0,n.jsx)(e.a,{"aria-hidden":"true",tabIndex:"-1",href:"#conclusion",children:(0,n.jsx)(e.span,{className:"icon icon-link"})}),"Conclusion"]}),` `,(0,n.jsx)(e.p,{children:`In this article, we've seen how to use the react-native-reanimated library to create a custom slider component with a Balloon animation. We've also seen how to use the react-native-redash library to create a custom Text component that animates the text when the value changes. I hope you've enjoyed this article, and I hope you've learned something new. If you have any questions, feel free to ask them in the comments on Patreon, I'll be happy to answer them.`})]})}}var x=w;function d(a,s){throw new Error("Expected "+(s?"component":"object")+" `"+a+"` to be defined: you likely forgot to import, pass, or provide it.")}return T;})(); ;return Component;