Difference between revisions of "Pokemon"

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(Created page with "You can use the api provided by https://pokeapi.co/ to provide data for this appication. Create a new folder with two files: index.html <!DOCTYPE html> <html> <head>...")
 
 
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Line 1: Line 1:
You can use the api provided by https://pokeapi.co/ to provide data for this appication.
You can use the api provided by https://pokeapi.co/ to provide data for this appication.


==Step One - load the data==
Create a new folder with two files:
Create a new folder with two files:


index.html
'''index.html'''
<!DOCTYPE html>
<pre>
<html>
<!DOCTYPE html>
<html>
     <head>
     <head>
         <script src="pokemon.js" defer></script>
         <script src="pokemon.js" defer></script>
Line 12: Line 14:
         <h1>Welcome to the Pokemon App</h1>
         <h1>Welcome to the Pokemon App</h1>
         <div id="detail"></div>
         <div id="detail"></div>
        <div id="pokelist"></div>
     </body>
     </body>
</html>
</html>
</pre>
'''pokemon.js'''
<pre>
document.body.onload = async ()=>{
    let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
    let data = await resp.json();
    document.getElementById('pokelist').innerHTML = data.results[0].name;
}
</pre>
*Double click on the file index.html to open it in chrome
*Open <code>Developer Tools</code> to see how the data is pulled into the JavaScript program
[[File:poke2.png|border|500px|First Attempt at Pokemon App]]
 
Notice that although you have the details of many pokemon you are only showing one of them.
 
==Step Two - show a list of pokemon==
To show the name of each pokemon you can use a loop:


pokemon.js
pokemon.js
document.body.onload = async ()=>{
<pre>
document.body.onload = async ()=>{
    let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
    let data = await resp.json();
    for(let i=0;i<20;i++){
      let div = document.createElement('div');
      div.innerText = data.results[0].name;
      document.getElementById('pokelist').append(div);
    }
}
</pre>
 
Notice that there are two errors in the above code:
*Each time around the loop it always shows element 0 of the <code>data.results</code> array
*Only 20 names are shown, even though the list contains more than that
 
==Step Three - React to user click events==
You can make something happen when the user clicks on a name in the <code>pokelist</code>
 
'''pokemon.js'''
<pre>
document.body.onload = async ()=>{
     let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
     let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
     let data = await resp.json();
     let data = await resp.json();
     document.getElementById('detail').innerHTML = data;
     for(let i=0;i<data.result.length;i++){
}
      let div = document.createElement('div');
      div.innerText = data.results[i].name;
      div.onclick = ()=>{
        document.getElementById('detail').innerHTML = `
          <h2>${data.results[i].name}</h2>
        `;
      }
      document.getElementById('pokelist').append(div);
    }
}
</pre>
 
==Step Four - Add some styling==
You should create a file pokemon.css and a reference to this.
You can:
*Make the list scrollable
*Change the cursor to make the click action more inviting
*Make the selected item show up
 
Code changes required
[[File:poke3.png|border|800px|Changes required]]
 
How the app should look now:
[[File:poke4.png|border|400px|New Look to App]]

Latest revision as of 21:02, 16 August 2022

You can use the api provided by https://pokeapi.co/ to provide data for this appication.

Step One - load the data

Create a new folder with two files:

index.html 

<!DOCTYPE html>
<html>
    <head>
        <script src="pokemon.js" defer></script>
    </head>
    <body>
        <h1>Welcome to the Pokemon App</h1>
        <div id="detail"></div>
        <div id="pokelist"></div>
    </body>
</html>

pokemon.js 

document.body.onload = async ()=>{
    let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
    let data = await resp.json();
    document.getElementById('pokelist').innerHTML = data.results[0].name;
}
  • Double click on the file index.html to open it in chrome
  • Open Developer Tools to see how the data is pulled into the JavaScript program

First Attempt at Pokemon App

Notice that although you have the details of many pokemon you are only showing one of them.

Step Two - show a list of pokemon

To show the name of each pokemon you can use a loop:

pokemon.js 

document.body.onload = async ()=>{
    let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
    let data = await resp.json();
    for(let i=0;i<20;i++){
      let div = document.createElement('div');
      div.innerText = data.results[0].name;
      document.getElementById('pokelist').append(div);
    }
}

Notice that there are two errors in the above code:

  • Each time around the loop it always shows element 0 of the data.results array
  • Only 20 names are shown, even though the list contains more than that

Step Three - React to user click events

You can make something happen when the user clicks on a name in the pokelist

pokemon.js 

document.body.onload = async ()=>{
    let resp = await fetch("https://pokeapi.co/api/v2/pokemon/?limit=30");
    let data = await resp.json();
    for(let i=0;i<data.result.length;i++){
      let div = document.createElement('div');
      div.innerText = data.results[i].name;
      div.onclick = ()=>{
        document.getElementById('detail').innerHTML = `
          <h2>${data.results[i].name}</h2>
        `;
      }
      document.getElementById('pokelist').append(div);
    }
}

Step Four - Add some styling

You should create a file pokemon.css and a reference to this. You can:

  • Make the list scrollable
  • Change the cursor to make the click action more inviting
  • Make the selected item show up

Code changes required Changes required

How the app should look now: New Look to App

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