Old school D3 from simpler times

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ngocbien

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simple bar chat with interaction

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forked from romsson's block: simple bar chat with interaction

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    rect {
      fill: white;
      stroke: black;
      stroke-width: 1px;
    }
  </style>
</head>

<body>
  <script>

var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);

var data = [22, 32, 21, 23, 10, 22, 11, 19, 30, 50];
    
    var x = d3.scaleLinear().range([0, 500]).domain([0, data.length]);
    var y = d3.scaleLinear().range([0, 100]).domain([0, d3.max(data)]);
    
    var g = svg.append("g").attr("transform", "translate(100, 0)");
    
    g.selectAll("text").data(data).enter().append("text")
      .text(function(d) { return d; })
      .attr("y", 200)
      .attr("x", function(d, i) { return x(i) + 20; })
      .style("font-size", 12)
    	.style("text-anchor", "middle")
      .style("font-family", "monospace");
    //NEU XOA CAI g PHIA DUOI THI KHONG CO cột!!
    //g trên để tạo các ký tự 22, 32 vân vân
    //g dưới để tạo các cột
     g.selectAll("rect").data(data).enter().append("rect")
    	.attr("x", function(d, i) { return x(i); })
    	.attr("y", function(d) { return 170 - y(d); })
    	.attr("height", function(d) { return y(d); })
			.attr("width", 500 / data.length -10 )
    //TU DAY TRO XUONG LA DE INTERACTION
    	.on("mouseover", function(d, i) {
      	d3.select(this).style("fill", "red");
        // Using Ids instead of values
      	d3.selectAll("text").filter(function(e, j) {
          return i === j;
        })
        .style("font-size", 24);
      
    	})
     .on("mouseout", function(d, i) {
      	d3.select(this).transition().duration(500).style("fill", "white");
        
        // Should be using Ids instead of values
      	d3.selectAll("text").filter(function(e, j) {
          return i === j;
        })
        .transition().duration(500)
        .style("font-size", 12);
     })

</script>
</body>

https://d3js.org/d3.v4.min.js