Function styleString

explainshell/web/static/js/d3.v3.js:7265–7270

()

    }
    return d3_transition_tween(this, "style." + name, value, function(b) {
      function styleString() {
        var a = d3_window.getComputedStyle(this, null).getPropertyValue(name), i;
        return a !== b && (i = interpolate(a, b), function(t) {
          this.style.setProperty(name, i(t), priority);
        });
      }
      return b == null ? styleNull : (b += "", styleString);
    });
  };