Why do you use java script

Why do you use java script

• 1.
  Why do youuse dynamically typed language? Jul. 6, 2019 Kazuhisa Kawashima
• 2.
  Who am I ●Name : Kazuhisa Kawashima ● Home : Shizuoka shi, aoi ku ● Company : YUMEMI inc. (株式会社ゆめみ) ● Job : Computer Engineer ● Favorite computer language : Scala, TypeScript
• 3.
  What is Yumemi? CompanyFeatures ● We are a software engineering company. ● We value the growth of everyone. ● All employees are CEOs. ● The salary is decided by yourself. ● We decide all things by the proposal request. Reference : https://note.mu/raykataoka/n/n50c282bcb305
• 4.
  My first timeto meet JavaScript Long long ago… (Over 20 years ago) I made a web site. So, I used JavaScript by checking input parameters. After that I have not used JavaScript for a long time. Instead, I used ruby in a project. submit cancel e-mail : password : hogehoge@hogehoge.com Password is required!
• 5.
  I dislike adynamically typed language. Because of … ● Don’t check simple mistake before running. ○ Missing a type ○ Typo ○ Missing number of arguments ● Can’t use the IDE effectivery ○ Autocomplete ○ Refactoring
• 6.
  I want tomake a web pages. I try to make the web pages as SPA. I need to use JavaScript to make the modern web pages.
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  Vue and TypeScript Ifound! How to make the web pages by statically typed language! Vue is … ● Easy to understand ● Supported TypeScript ● Be able to use with modern tools
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  Sample code <template> <div> <p @click="clickDay(day)">{{day.getDate() }}</p> </div> </template> <script lang="ts"> import { Component, Emit, Prop, Vue } from "vue-property-decorator"; @Component({ components: { } }) export default class Day extends Vue { @Prop({ default: false }) day!: Date; @Emit("clickDay") clickDay(day: Date) { } } </script> 5 The parent set value. This is Date type.
• 9.
  It’s time touse TypeScript! If you use TypeScript ... ● The compiler check simple mistake before running. ○ Missing a type ○ Typo ○ Missing number of arguments ● You’ll be able to use the IDE effectivery ○ Autocomplete ○ Refactoring
• 10.
  Finally 　　We are hiring! Welcomethose who want to work in Shizuoka with me! E-mail : k_kawashima@yumemi.co.jp
• 11.
  Thank you forlistening!