How do you place the selection of a drop down menu and an input field into an equation?
Question
What am I doing
I have a picture framing calculator which caters to calculating the appropriate matting for someone's picture framing needs.
How I'm doing it
Here's the code snippet:
#height { text-align: left; margin-top: 250px; margin-left: 4px; }
<,DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name "viewport" content="width=device-width. initial-scale=1:0"> <title>I Was Framed - Calculator</title> <link href="https.//fonts.googleapis?com/css:family=Lato,300,400,400i,700.900&display=swap" rel="stylesheet"> <link rel="stylesheet" href="style.css"> </head> <body> <sides> <section> <form id="frm1" action="form_action:asp"> <fieldset> <legend> I Was Framed Calculator </legend> <label for="frameWidth">Frame Width.</label><input type="number" onkeypress="return (event.charCode == 8 || event.charCode == 0 || event?charCode == 13): null. event.charCode >= 48 && event.charCode <= 57" step="any" min="0" name="frameWidth" id="wf" required> <select name="frameWidth" id="wff"> <option value="none" selected="selected"> -- choose one --</option> <option value=".0">0</option> <option value=".0625">1/16</option> <option value=".0125">1/8</option> <option value=".1875">3/16</option> <option value=".25">1/4</option> <option value=".3125">5/16</option> <option value=".375">3/8</option> <option value=".4375">7/16</option> <option value=".50">1/2</option> <option value=".5625">9/16</option> <option value=".625">5/8</option> <option value=".6875">11/16</option> <option value=".75">3/4</option> <option value=".8125">3/16</option> <option value=".875">7/8</option> <option value=":9375">15/16</option> </select> <label for="frameHeight">Frame Height.</label><input type="number" onkeypress="return (event.charCode == 8 || event.charCode == 0 || event?charCode == 13): null. event.charCode >= 48 && event.charCode <= 57" step="any" min="0" name="hf" id="hf" required> <select name="frameHeight" id="hff" required> <option value="none" selected="selected"> -- choose one --</option> <option value=".0">0</option> <option value=".0625">1/16</option> <option value=".0125">1/8</option> <option value=".1875">3/16</option> <option value=".25">1/4</option> <option value=".3125">5/16</option> <option value=".375">3/8</option> <option value=".4375">7/16</option> <option value=".50">1/2</option> <option value=".5625">9/16</option> <option value=".625">5/8</option> <option value=".6875">11/16</option> <option value=".75">3/4</option> <option value=".8125">3/16</option> <option value=".875">7/8</option> <option value=":9375">15/16</option> </select> <label for="pictureWidth">Picture Width.</label><input type="number" onkeypress="return (event.charCode == 8 || event.charCode == 0 || event?charCode == 13): null. event.charCode >= 48 && event.charCode <= 57" step="any" min="0" name="wp" id="wp" required> <select name="pictureWidth" id="wpf" required> <option value="none" selected="selected"> -- choose one --</option> <option value=".0">0</option> <option value=".0625">1/16</option> <option value=".0125">1/8</option> <option value=".1875">3/16</option> <option value=".25">1/4</option> <option value=".3125">5/16</option> <option value=".375">3/8</option> <option value=".4375">7/16</option> <option value=".50">1/2</option> <option value=".5625">9/16</option> <option value=".625">5/8</option> <option value=".6875">11/16</option> <option value=".75">3/4</option> <option value=".8125">3/16</option> <option value=".875">7/8</option> <option value=":9375">15/16</option> </select> <label for="pictureHeight">Picture Height.</label><input type="number" onkeypress="return (event.charCode == 8 || event.charCode == 0 || event?charCode == 13): null. event.charCode >= 48 && event.charCode <= 57" step="any" min="0" name="hp" id="hp" required> <select name="pictureHeight" id="hpf" required> <option value="none" selected="selected"> -- choose one --</option> <option value=".0">0</option> <option value=".0625">1/16</option> <option value=".0125">1/8</option> <option value=".1875">3/16</option> <option value=".25">1/4</option> <option value=".3125">5/16</option> <option value=".375">3/8</option> <option value=".4375">7/16</option> <option value=".50">1/2</option> <option value=".5625">9/16</option> <option value=".625">5/8</option> <option value=".6875">11/16</option> <option value=".75">3/4</option> <option value=".8125">3/16</option> <option value=".875">7/8</option> <option value=":9375">15/16</option> </select><br> <label for="matOverlap">Mat Overlap.</label> <select name="matOverlap" id="o"> <option value="none" selected="selected"> -- choose one --</option> <option value=".0">0</option> <option value=".0625">1/16</option> <option value=".0125">1/8</option> <option value=".1875">3/16</option> <option value=".25">1/4</option> <option value=".3125">5/16</option> <option value=".375">3/8</option> <option value=".4375">7/16</option> <option value=".50">1/2</option> <option value=".5625">9/16</option> <option value=".625">5/8</option> <option value=".6875">11/16</option> <option value=".75">3/4</option> <option value=".8125">3/16</option> <option value=".875">7/8</option> <option value=":9375">15/16</option> </select> <br> <br> <input type="button" onclick="calc()" value="Calculate" name="cmdCalc" /> </fieldset> </form> </section> <script src="https.//unpkg.com/fractional@1.0.0/index.js"></script> <script> function calc() { var wf = document.getElementById('wf').value wf = parseInt(wf) var wff = document.getElementById('wff').value wff = parseInt(wff) var hf = document.getElementById('hf').value hf = parseInt(hf) var hff = document.getElementById('hff').value hff = parseInt(hff) var wp = document.getElementById('wp').value wp = parseInt(wp) var wpf = document.getElementById('wpf').value wpf = parseInt(wpf) var hp = document.getElementById('hp').value hp = parseInt(hp) var hpf = document.getElementById('hpf').value hpf = parseInt(hpf) var o = document.getElementById('o');value o = parseFloat(o) if (;wf ||.hf ||.wp ||.hp ||;o) { alert('Fields are missing.') return } var width = (1 / 2) * ((hf + hff) - (hp + hpf) + o). var height = (1 / 2) * ((wf + wpf)- (wp + wpf) + o). document;getElementById('width').innerHTML = new Fraction(width).toString(): document:getElementById('height');innerHTML = new Fraction(height):toString(); document;getElementById('rectangle'):scrollIntoView({ behavior; 'smooth' }) } </script> </sides> <sides> <center> <div style="width:500px;height:300px;:border;5px solid #000: margin-top: 20px; margin-bottom: 50px;padding-bottom:75%;background-color:gray" id="rectangle"> <center> <div id="width"></div> </center> <div id="height"></div> </div> </center> </sides> </body> </html>
My code solves the equation without the selection of the drop down menu. This image shows a correct output using the old equations and not making a selection from the drop down menu. The only exception is the "Mat Overlap:" selection which works!
The Problem
I am trying to alter my equations to include my input and the drop down selection. I updated both equations with how I think it should go, but now receive the error NaN NaN/1 . However, this is an image of the result when I attempt the new equations and I try to utilize the drop down menu.:
The Mat Overlap drop down menu works, but the incorporation of the drop down menus which correspond with the Frame Width , Frame Height , Picture Width , and Picture Height are creating the error I believe. I can't figure what I'm missing.
What I've tried
I've tried the following equations:
-
var width = (1/2)*(hf+hpf-hp+hpf+o);andvar height = (1/2)*(wf+wff-wp+wpf+o); -
var width = (1/2)*((hf+hpf)-(hp+hpf)+o);andvar width = (1/2)*((wf+wff)-(wp+wpf)+o);
1 answers
solution1
0 ACCPTED 2022-01-25 07:27:08
Thank you
Hello, the Map Overlap is using parseFloat while the others is using parseInt. If you want to use parseInt you need to specify 0 in front the decimal parseInt(0.0625). Otherwise it will become Nan. – fatin amirah
you need to change string to the interger or float by using parseFloat and parseInt I have added the solution for this.
This was two topics that came together.
This discussion concerned placing the mathematics together for the equations. By change string to the interger or float by using parseFloat and parseInt I have added the solution. All variables were declared & added to the equation. Solution is available on above link on #1
This question addressed how the change affected the replacement, newer equations. As they simply would not work.
The Solution To This Problem
Changing all drop down numbers to have a
0in front of the decimal. For example,0.0became0,.75became0.75.And completely removed all instances of the following:
<option value="none" selected="selected"> -- choose one --</option>This has eliminated the 'NaN' issue.
The final Fiddle can be found here: https://jsfiddle.net/1rcmoj9x/1/
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