- Started on Mar 30 and finished on Apr 01 2022.
- Started following the tutorial and added all the additional feature suggested in the tutorial:
- Display the location for each move in the format (col, row) in the move history list: is added by having an additional function with switch case to convert the square id into row-col coordinate;
- Bold the currently selected item in the move list: is added by having an additional state: bold, stored in an array of 9, each with a value of false to represent each button/move in the chronology. Whenever it's clicked, the onClick function will trigger the array at that index/step to turned into true, and the corresponding button (same index) will show text as bold;
- Rewrite Board to use two loops to make the squares instead of hardcoding them: self explanatory;
- Add a toggle button that lets you sort the moves in either ascending or descending order: is added by having another state: asc(ending) with a value of true. Whenever the button clicked, the onClick function will trigger for that state to switch into false, thus the if/else statement will trigger the CSS style for that block to do flex-direction: column-reverse. It's not worth it to have a state and a reversing algorithm just to show the order in reverse;
- When someone wins, highlight the three squares that caused the win: is added by having another state, i.e. win(ner) with [] as value, which will change whenever the invoked function in the render method returns a value [x/o, index1, index2, index3]. I just need to add conditional in the Square rendering to have CSS style triggered to be bold whenever that Square id matched any one of those indices;
- When no one wins, display a message about the result being a draw: is added just by checking the state.stepNumber. If it is 10 and the state.winner is still [], for sure it is a draw. For the display, just need to add a ternary statement whether to show Next player ... or ..is a draw;
- On top of the abovementioned feature, I added the undo button so that user can undo their move on specific point in time: is added simply by having a method undo that slice the state.history from zero to the specific moves already clicked by the user, and return the state since everything else has already been changed by the jumpTo method.
Problem: Getting React - uncaught TypeError: Cannot read property 'setState' of undefined when Reverse the Order button got clicked. Cause: the this.reverseOrder must be bound in the constructor. Solution: adding this.reverseOrder = this.reverseOrder.bind(this) Reference: https://stackoverflow.com/questions/32317154/react-uncaught-typeerror-cannot-read-property-setstate-of-undefined
Problem: Getting "Uncaught TypeError: this.undo is not a function" on undo function that mimics jumpTo function in placing and binding across the whole app. Cause: this.undo = this.undo(this) suppose to be ...this.undo.bind(this) Solution: completely use arrow syntax on function expression or add 'bind'
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