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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>BMI Calculator</title>
<!-- favicon -->
<link rel="apple-touch-icon" sizes="180x180" href="img/favicon/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="img/favicon/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="img/favicon/favicon-16x16.png">
<link rel="manifest" href="img/favicon/site.webmanifest">
<link rel="mask-icon" href="img/favicon/safari-pinned-tab.svg" color="#5bbad5">
<link rel="shortcut icon" href="img/favicon/favicon.ico">
<meta name="msapplication-TileColor" content="#da532c">
<meta name="msapplication-config" content="img/favicon/browserconfig.xml">
<meta name="theme-color" content="#0000FF">
<!-- Bootstrap CSS -->
<link type="text/css" rel="stylesheet" href="assets/bootstrap-4-0-0.min.css">
<link type="text/css" rel="stylesheet" href="assets/bootstrap-vue.css"/>
<!-- Google Fonts -->
<link href="https://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800" rel="stylesheet">
<!-- custom CSS -->
<link rel="stylesheet" type="text/css" href="css/animate.css">
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<!-- background -->
<div id="background">
<!-- Generator: Adobe Illustrator 18.1.1, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
viewBox="0 0 1920 1652.6" enable-background="new 0 0 1920 1652.6" xml:space="preserve">
<linearGradient id="SVGID_1_" gradientUnits="userSpaceOnUse" x1="0" y1="826.2889" x2="1920" y2="826.2889">
<stop offset="0" style="stop-color:#4568DC"/>
<stop offset="1" style="stop-color:#B06AB3"/>
</linearGradient>
<path opacity="0.4" fill="url(#SVGID_1_)" d="M0,148.6c0,183.2,69.6,359.5,194.8,493.2l731.7,782
c136.5,145.9,327.4,228.7,527.1,228.7H1920V0H0V148.6z"/>
<linearGradient id="SVGID_2_" gradientUnits="userSpaceOnUse" x1="860.8442" y1="826.2889" x2="1920" y2="826.2889">
<stop offset="0" style="stop-color:#4568DC"/>
<stop offset="1" style="stop-color:#B06AB3"/>
</linearGradient>
<path opacity="0.2" fill="url(#SVGID_2_)" d="M878.1,777.5c-43.4,195-3.9,399.3,108.8,564.2l100.9,147.5c0.3,0.5,0.6,1.1,1,1.6
l66.5,97.2c92.8,42.1,194.3,64.5,298.3,64.5h212.3H1920V0h-869.1L878.1,777.5z"/>
</svg>
</div>
<!-- app window -->
<div id="app" class="animated fadeInUp" v-cloak>
<div class="container">
<!-- title row -->
<div id="row-title" class="row">
<div class="col">
<h1>BMI Calculator</h1>
<hr>
<h4>Easily calculate your Body Mass Index</h4>
</div>
</div>
<!-- input row -->
<div id="row-input" class="row">
<div class="col">
<form>
<div class="form-group">
<b-input-group prepend="Weight">
<b-form-input v-if="weightSelected == 'kg'" v-model.number="weight" type="number" min=0 step="any" size="lg"></b-form-input>
<b-form-input v-if="weightSelected == 'lb'" v-model.number="weight_lb" type="number" min=0 step="any" size="lg"></b-form-input>
<b-input-group-append>
<div>
<b-form-select v-model="weightSelected" :options="weightOptions" size="lg">
<div>Selected: <strong>{{ weightSelected }}</strong></div>
</div>
</b-input-group-append>
</b-input-group>
</div>
<div class="form-group">
<b-input-group prepend="Height">
<b-form-input v-if="heightSelected !== 'us'" v-model.number="height" type="number" min=0 step="any" size="lg"></b-form-input>
<b-form-input v-if="heightSelected == 'us'" v-model.number="height_ft" type="number" min=0 step="any" size="lg"></b-form-input>
<b-form-input v-if="heightSelected == 'us'" v-model.number="height_inch" type="number" min=0 step="any" size="lg"></b-form-input>
<b-input-group-append>
<div>
<b-form-select v-model="heightSelected" :options="heightOptions" size="lg">
<div>Selected: <strong>{{ heightSelected }}</strong></div>
</div>
</b-input-group-append>
</b-input-group>
</div>
</form>
</div>
</div>
</div>
<!-- results row -->
<div id="row-result" class="row gradient-main">
<div class="col">
<span class="title">
Your BMI is:
</span><br>
<span class="group">
{{ weightGroup }}
</span>
</div>
<div class="col bmi">
{{ bmi }}
</div>
</div>
</div>
<!-- javascript -->
<script src="assets/vue.min.js"></script>
<script src="assets/polyfill.min.js"></script>
<script src="assets/bootstrap-vue.js"></script>
<script>
new Vue({
el: '#app',
data: {
weight: 75,
weight_lb: 0,
weightSelected: 'kg',
weightOptions: [
{ value: 'kg', text: 'kg' },
{ value: 'lb', text: 'lb' }
],
height: 180,
height_ft: 0,
height_inch: 0,
heightSelected: 'cm',
heightOptions: [
{ value: 'cm', text: 'cm' },
{ value: 'us', text: 'ft/in' }
]
},
computed: {
bmi() {
return round(calculateBMI(this.weight, this.height), 1);
},
weightGroup() {
return getWeightGroup(this.bmi);
}
},
watch: {
weightSelected(val) {
if (val == 'lb') {
this.weight_lb = round(kgToLb(this.weight), 1);
}
},
weight_lb(val) {
this.weight = round(lbToKg(this.weight_lb), 1);
},
heightSelected(val) {
if (val == 'cm') {
this.height = round(imperialToCm(this.height_ft, this.height_inch), 0);
} else if (val == 'us') {
this.updateImperial(this.height);
}
},
height_ft(val) {
this.height = round(imperialToCm(val, this.height_inch), 0);
},
height_inch(val) {
this.height = round(imperialToCm(this.height_ft, val), 0);
}
},
methods: {
updateImperial(cm) {
this.height_ft = cmToImperial(cm).feet;
this.height_inch = cmToImperial(cm).inches;
}
}
});
// easy round function
function round(value, precision) {
return Number(Math.round(value+'e'+precision)+'e-'+precision);
}
// weight conversion functions
function lbToKg(lb) {
return lb * 0.45359237;
}
function kgToLb(kg) {
return kg * 2.20462262185;
}
// length conversion functions
function imperialToCm(feet, inches) {
var cm = feet * 30.48; // ft to cm
cm += inches * 2.54; // inch to cm
return cm;
}
function cmToImperial(cm) {
var realFeet = ((cm*0.393700) / 12);
var feet = Math.floor(realFeet);
var inches = Math.round((realFeet - feet) * 12);
return {
feet: feet,
inches: inches
}
}
// BMI functions
function calculateBMI(kg, cm) {
var m = cm / 100;
if (kg > 0 && m > 0) {
return kg / Math.pow(m, 2);
} else {
return 0;
}
}
function getWeightGroup(bmi) {
if (bmi == 0) {
return "";
} else if (bmi < 15) {
return "Very Severely Underweight";
} else if (bmi >= 15 && bmi < 16) {
return "Severely Underweight";
} else if (bmi >= 16 && bmi < 18.5) {
return "Underweight";
} else if (bmi >= 18.5 && bmi < 25) {
return "Healthy Weight";
} else if (bmi >= 25 && bmi < 30) {
return "Overweight";
} else if (bmi >= 30 && bmi < 35) {
return "Moderately Obese";
} else if (bmi >= 35 && bmi < 40) {
return "Severely Obese";
} else if (bmi > 40) {
return "Very Severely Obese";
}
}
</script>
</body>
</html>