Tag23 it’s a library for coding inside html, it allows defining conditions, loops and easy evaluations of values
For install you just need to add the script tag in the head of your browser
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
The source can be found on the fowllowing link
In these example we are creating an counter, that uses the case and unless keywords to show the value based on colors
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
</head>
<body>
<div Tag23Start style="display: none;">
<script>let a = 0</script>
<button onclick="a-=1"> Decrement a</button>
<button onclick="a+=1"> Increment a</button>
<br>
<h1 unless="a >= 0" style="color: red;">the value of a is <span print="a"/> </h1>
<h1 case="a >= 0" style="color: blue;" >the value of a is <span print="a"/> </h1>
</div>
</body>
</html>
For printing values you just need to add the properties print to any tag you want
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
</head>
<body>
<div Tag23Start style="display: none;">
<script>
let data = {};
</script>
<h3>Name</h3>
<input onchange="data.name = this.value" placeholder="name">
<h3>Age</h3>
<input onchange="data.age = this.value" placeholder="age">
<h3>Profession</h3>
<input onchange="data.profession = this.value" placeholder="profession">
<h3>Gender</h3>
<select onchange="data.gender = this.value">
<option value="male">Male</option>
<option value="female">Female</option>
</select>
<br>
<p> Your name is <span print="data.name"></span>
you are <span print="data.age"></span> years old,
you work as an <span print="data.profession"></span>
and you are a <span print="data.gender"></span>
</p>
</div>
</body>
</html>
By adding the prefix eval inside any attribute, its evaluates the result
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
</head>
<body>
<div Tag23Start style="display: none;">
<script>
let images = [
'https://cdn.pixabay.com/photo/2020/08/19/22/51/roe-deer-5502246_1280.jpg',
'https://cdn.pixabay.com/photo/2016/05/02/13/17/deer-1367217_1280.jpg',
'https://cdn.pixabay.com/photo/2017/08/09/18/24/animal-2615377_1280.jpg'
]
let point = 0;
function next(){
if(point < (images.length - 1)){
point+=1;
return;
}
point = 0;
}
function previews(){
if(point > 0){
point-=1;
}
}
</script>
<br>
<img evalsrc="images[point]" width="20%" height="20%">
<br>
<br>
<h1> Image <span print="point"></span></h1>
<button onclick="previews()">Previews</button>
<button onclick="next()">Next</button>
</div>
</body>
</html>
Conditions can be determined by the keywords case e unless
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
</head>
<body>
<div Tag23Start style="display: none;">
<script>
let data = {};
</script>
<h3>Name</h3>
<input onchange="data.name = this.value" placeholder="name">
<h3>Email</h3>
<input onchange="data.email = this.value" placeholder="email">
<h3>Password</h3>
<input onchange="data.password = this.value" placeholder="password">
<h3>Repeat Password</h3>
<input onchange="data.repeat_password = this.value" placeholder="repeat password">
<br>
<h3 unless="data.repeat_password == data.password "
style="color: red"
>Passwords must be equal
</h3>
<br>
<script>
function its_all_correct(){
if(!data.name){
return false;
}
if(!data.email){
return false;
}
if(!data.password){
return false;
}
if(data.password !== data.repeat_password){
return false;
}
return true;
}
</script>
<button case="its_all_correct()"> Subscribe</button>
</div>
</body>
</html>
you can create loops in object or list easily, by using the for and in keywords
in these example ,the values will be provided by the method **this
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
<style>
.json_code{
width: 40%;
background-color: #00003b;
color: white;
position: absolute;
left: 40%;
top: 10%;
}
.form_div{
background-color: #e0e0e0;
width: 30%;
}
</style>
</head>
<body>
<div Tag23Start style="display: none;">
<script>
let data = [
{
"name":"user1",
"age":30
},
{
"name":"user2",
"age":22
}
];
</script>
<div for="x" in="data" class="form_div">
<h4>Name</h4>
<input set_value="this.x()['name']" onchange="this.x()['name'] = this.value">
<h4>Age</h4>
<input type="number" set_value="this.x()['age']" onchange="this.x()['age'] = Number(this.value)">
<br>
<button onclick="this.x_destroy()">Destroy <span print="this.x_index()"></span></button>
<br>
<br>
</div>
<button onclick="data.push({})"> Add</button>
<code class="json_code" >
<pre print="JSON. stringify(data,null,4)">
</pre>
</code>
</div>
</body>
</html>
its also possible to work with objects
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
<style>
.json_code{
width: 40%;
background-color: #00003b;
color: white;
position: absolute;
left: 40%;
top: 10%;
}
.form_div{
background-color: #e0e0e0;
width: 30%;
}
</style>
</head>
<body>
<div Tag23Start style="display: none;">
<script>
let data = {
"user1":{
"name": "user1",
"age": 30
},
"user2":{
"name": "user2",
"age": 22
}
};
</script>
<div for="x" in="data" class="form_div">
<h4>Name</h4>
<input set_value="this.x()['name']" onchange="this.x()['name'] = this.value">
<h4>Age</h4>
<input type="number" set_value="this.x()['age']" onchange="this.x()['age'] = Number(this.value)">
<br>
<button onclick="this.x_destroy()">Destroy <span print="this.x_key()"></span></button>
<br>
<br>
</div>
<code class="json_code" >
<pre print="JSON. stringify(data,null,4)">
</pre>
</code>
</div>
</body>
</html>
If you need to add a function to main loop, these it’s extremely easy, you just need to call the tag23_main_loop function, to add an function to run on the main loop
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Counter</title>
<script src="https://cdn.jsdelivr.net/gh/OUIsolutions/Tag23@main/versions/Tag23_v0.33.js"></script>
</head>
<body>
<div Tag23Start style="display: none;">
<script>
let total_iterations = 0;
</script>
<script>tag23_main_loop(()=>{
total_iterations+=1;
})</script>
<h1>you are on iteration <span print="total_iterations"></span></h1>
<h1>its passed <span print="TAG_23_TIME_PASSED/ 1000"></span> seconds</h1>
</div>
</body>
</html>