Develop Reference

How to implement EasyStar.js pathfinding logic to my present grid generator

I have this project where I need to visualize 2d grid pathfinding.
I managed to create a grid generator that generates the grid up to 20x20.
I need to install a library that provides a pathfinding algorithm and apply it to my present grid generator. I spend countless hours already but I'm stuck.
What do I expect to get:
I need to have a grid-item 'start' (green) on the left first column and an 'end' grid item on the last column (any row for both) as all the grid items have to be filled (non-walkable) and then as soon as I click the grid item it walkable. When there is a clear path between the start and end it should color accordingly (pretty much pathfinding :D)
Here is the sandbox - https://codesandbox.io/s/epic-gagarin-v9pce9?file=/src/index.js:229-304
I have already tried various approaches, but the majority of the time as soon as I import the easyst.js
const EasyStar = require("easystarjs");
const easystar = new EasyStar.js();
and trying to loop the grid and etc, everything stops

Qualtrics: Custom slider range with embedded data using javascript

I want to create one single slider in Qualtrics where the min, the MAX and the intervals are chosen according to 4 different embedded data. I need help with the Javascript.
Why do I need one single slider? I need a single slider because I have 16 questions in total, and it is easier to recall 16 questions ID rather than 64 different questions ID.
How should the slider change? I need the slider MAX to be either 1, 10, 100 or 177. Moreover, I always need to have 100 possible choices. Therefore, I need to introduce 2, 1, 0 and 0 decimals, respectively.
Why Javascript? Qualtrics does not allow dynamic custom slider values.
What I have tried so far:
I tried using the default options, but they are not helpful.
I tied looking for resolved questions on StackOverflow but only found this thread: Qualtrics: Dynamically adjusting max value of slider

What your post asks is not a specific question, but rather an entire project. To aid you in this, I have broken up your question into subproblems, all of which can be resolved with simple googling.
First, set up your slider so that it ranges from 0 to 100 - that will ensure that the user always has 100 options. You can then perform a calculation to adjust that to any range you would like based on your embedded data (information how to get embedded data in JS can be found in this post or on the Qualtrics JS API). For more information on how to scale to any rage, here's a good place to start. This calculation is critical as you will use it later on to set the exact value of the grid lines (i.e. intervals) as well as the displayed value (if you opt to display value).
NB: Unfortunately, you are forced to set up the slider to range from 0-100, as you cannot set up more than 20 grid lines. If you could, you could have just set up 100 grid lines and removed the grid lines values and used labels instead for guidance, but there you go.
Next, start with a slider that has a single grid line in the options. You can now adjust these grid lines to your intervals. Specifically, to get the field where these gridlines are defined, get the ul with class name numbers in your slider question. This could look something like this:
let numbers = document.getElementById('QID1').getElementsByClassName('numbers')[0]
This numbers variable will now contain an HTML element with its children being a list of li elements, with each defining a different interval - calculate those interval however your heart desires and add them to the numbers element on the DOM. Tip: to see how this works, play around by examining the DOM when you vary the number of grid lines. Hint: careful when you set the widths (as this is your property to calculate) - for 2 grid lines or 4, all of the li elements have a width of 50 or 25, respectively, but for 11 grid lines the two li elements with classes first and last have width of 5 and the rest of the in-between li elements have a width of 10.
To customize the number that is shown in those intervals (to however many decimal places you want), adjust the innerHTML of those li elements.
Your next step is to make sure that if you do end up showing the value to the participant, then that value can only be a "legit" value. After all, we set the slider from 0 to 100, but it could be 50 to 250 and it must only show values 50-52-54 etc. To achieve that, find the element that displays the value and overwrite it with your calculation (the current value scaled to your desired range). To find the elements, use something like this:
document.getElementById('QID1~1~toolTipBox')
This will look for question with ID QID1 and then look at the first choice's toolTipBox. Overwrite the contest by change its innerHTML.
Finally, don't forget to adjust your data when you process it later on. After all, you have access to all embedded fields in the data, simply scale those to get the actual values (as the ones you will get will most likely be 0-100, though I am not 100% sure how Qualtrics decides what value to save in the data).

Manipulation of Google Graph - show / hide records

I have been looking around for a simple'ish solution that would allowing user to disable certain records on the graph. I know Google Charts API offeres ways to remove columns and rows. However, I don’t want to remove a row, I would like to “disable” it, so that it wouldn’t be used in the calculations, very similar to the google.visualization.ChartRangeFilter, except in ChartRangeFilter you set the date range to focuse on.
i.e. we have a line graph, x and y axis, with three lines for New York, London and Paris. I click on one of the points on the “Paris” line and that would disable that particular point, if I am to click on same point again than it will be enabled once again.
Options that were concidered:
1\ https://developers.google.com/chart/interactive/docs/events#the-select-event to try to "disable" the cell that user would click on.
2\ I have also been thinking to select all records by default and let user unselect them
Wondering if someone has a potential solution?
I found a similar solution, whichI was thinking to utilise, except their you hide / show the lines, rather than particular values..
In the fiddle example they use to make function happen
column: 6,
roleColumns: [7],
display: false
http://jsfiddle.net/asgallant/6gz2Q/

Highcharts Column Graph with background color?

I'm trying to make a column graph in Highcharts and it's not working out too hot. I'm essentially trying to give the column a background color that the data point can overlay. I want the effect of stacking without actually stacking if that makes sense. Any thoughts on what I can do?
Essentially I want it to look like a progress bar... there should be a distinct coloring between the top of the bar and the top of the graph itself. I've already tried stacking: percentage, but to no avail. Thoughts?

There are three options that come to mind:
1) To achieve the 'effect' of stacking, actually stack it: use a dummy series with a color set to the background color that you want, and set with values to fill the gap from the actual data.
Example:
http://jsfiddle.net/jlbriggs/Zf8C7/5/
[[edit for questions
The order of the series does not matter for this to work, and neither does the legendIndex.
What does matter, if you are using multiple series, is the stack property for each series - http://api.highcharts.com/highcharts#series.stack
Each group will need its own stack, and the dummy series and real series within each group need to be assigned to the same stack.
In addition, you need to have one overall max value.
Updated example:
http://jsfiddle.net/jlbriggs/4d9tm6b8/4/
(keep in mind, there are much smoother methods to process and build your data - this is a quick and dirty example whose purpose is to show how to properly use the stack property to do what you need)
]]
2) plotBands, as mentioned above
3) using the alternateGridColor property and set your data to skip an x axis
value between each point.
Reference:
- http://api.highcharts.com/highcharts#xAxis.alternateGridColor

draw vertical lines using jquery

I have the following json and I need to create a grid and also above the grid need to show vertical lines based on the values :
var arr = [];
arr= [
{"Measure":"Air Pollution","Rank":"1","Value":"15.5"},
{"Measure":"Water Pollution","Rank":"2","Value":"13.5"},
{"Measure":"Soil Erosion","Rank":"3","Value":"10.5"}
]
Now I need to create a grid and above the grid, need to create vertical bars based on the "Value". There will be 3 bars created since there are 3 Values. Now when 1st row in the grid is selected, the first vertical bar needs to be highlighted . Similarly, when the 1st vertical bar is selected, the 1st row in the grid to be selected. Creating the grid is not a problem since I am using KendoUI grid but to create the vertical bars and the selection is the one where I am stuck . Any views ?
Thanks.

Based on #Bogdan M.'s suggestion on using div elements, I've set up a jsFiddle demonstrating vertical bars built using jQuery. It relays on the input of values as an array of numbers, and converts those to DOM elements, setting their height accordingly.
This demo can be very easily updated to use the OP's supplied data structure, and selection behavior functionality can be added as well.
This final version (contains the complete solution, both for building the component and for assigning it with selection behavior) can be seen in the full demo on jsFiddle.
All that's left now is to assign handlers for the selection functionality - as cell / row listeners - to the KendoUI grid.

I see that you aim to visualize your data as a bar-chart. If so, don't re-invent the wheel. there are a lot of good JS libraries designated for that purpose.
I've had a good experience using HighCharts, try it out.
Disclaimer: This may be an overkill, but is a suited solution should the component be generic (for future compatibility with flexible data)