diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75448ca0a..894b74332 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - Set `NODE_ENV=production` for webpack `build` command
 - Fixed dynamic graph centering bug by updating `parseTransform` in `app/Svg/Parser.hs` to parse multiple transform functions and removing `getShapesMinXY` in `js/components/graph/Graph.js`
 - Switched CI provider from CircleCI to GitHub Actions
+- Cleared up documentation for various graph-related front-end functions
 
 ## [0.8.1] - 2026-08-10
 
diff --git a/js/components/common/react_modal.js.jsx b/js/components/common/react_modal.js.jsx
index b88cf771a..a06231d66 100644
--- a/js/components/common/react_modal.js.jsx
+++ b/js/components/common/react_modal.js.jsx
@@ -134,7 +134,11 @@ class CourseModal extends React.Component {
     }
   }
 
-  /** Helper function to format the time of a Time JSON object for display */
+  /** 
+   * Helper function to format a Time data object for display in the course modal. 
+   * @param {object} time A Time data object.
+   * @returns {string} The time formatted as a string (e.g. "Tuesday 11 - 13").
+   * */
   formatTime(time) {
     return DAY_TO_INT[time.weekDay] + " " + time.startHour + " - " + time.endHour
   }
@@ -142,45 +146,48 @@ class CourseModal extends React.Component {
   /**
    * Generate the data needed for the course modal table based on the meeting times corresponding
    * to a course in a given session.
-   * @param allMeetingTimes An array of MeetTime' objects corresponding to a particular course.
-   * @param session The session (F, S, Y) to query.
-   * @returns A map containing the table data that will appear in the course modal.
+   * @param {object[]} allMeetTimes An array of MeetTime' objects corresponding to a particular course.
+   * @param {string} session The session (F, S, Y) to query.
+   * @returns {object[]} An array of row data objects that will appear in the course modal table.
    */
-  getTable(allMeetingTimes, session) {
-    const sessions = allMeetingTimes.filter(lec => lec.meetData.session === session)
-    const sortedSessions = sessions.sort((firstLec, secondLec) =>
-      firstLec.meetData.section > secondLec.meetData.section ? 1 : -1
+  getTable(allMeetTimes, session) {
+    // Filter and sort the lecture sections in the specified session by their section code
+    const filteredMeetTimes = allMeetTimes.filter(meetTime => meetTime.meetData.session === session)
+    const sortedMeetTimes = filteredMeetTimes.sort((firstMeetTime, secondMeetTime) =>
+      firstMeetTime.meetData.section > secondMeetTime.meetData.section ? 1 : -1
     )
 
-    return sortedSessions.map(lecture => {
+    return sortedMeetTimes.map(meetTime => {
+      // Sort each section's meeting time blocks and corresponding locations and store them in arrays.
+      // times2, locations2 are used for the extra columns that appear in the table when viewing a Y course.
       const occurrences = { times1: [], locations1: [], times2: [], locations2: [] }
-      const sortedTimeData = lecture.timeData.sort((occ1, occ2) =>
-        occ1.weekDay > occ2.weekDay ? 1 : -1
+      const sortedTimeData = meetTime.timeData.sort((time1, time2) =>
+        time1.weekDay > time2.weekDay ? 1 : -1
       )
-      sortedTimeData.map(occurrence => {
+      sortedTimeData.map(time => {
         let location = " "
-        if (occurrence.timeLocation !== null && occurrence.timeLocation !== undefined) {
-          location = occurrence.timeLocation.buildingCode
+        if (time.timeLocation !== null && time.timeLocation !== undefined) {
+          location = time.timeLocation.buildingCode
         }
 
-        if (session === "Y" && occurrence.timeSession.endsWith("1")) {
+        if (session === "Y" && time.timeSession.endsWith("1")) {
           occurrences.locations2.push(location)
-          occurrences.times2.push(this.formatTime(occurrence))
+          occurrences.times2.push(this.formatTime(time))
         } else {
           occurrences.locations1.push(location)
-          occurrences.times1.push(this.formatTime(occurrence))
+          occurrences.times1.push(this.formatTime(time))
         }
       })
       const rowData = {
-        activity: lecture.meetData.section,
-        instructor: lecture.meetData.instructor,
+        activity: meetTime.meetData.section,
+        instructor: meetTime.meetData.instructor,
         availability:
-          lecture.meetData.cap -
-          lecture.meetData.enrol +
+          meetTime.meetData.cap -
+          meetTime.meetData.enrol +
           " of " +
-          lecture.meetData.cap +
+          meetTime.meetData.cap +
           " available",
-        waitList: lecture.meetData.wait + " students",
+        waitList: meetTime.meetData.wait + " students",
         time1: occurrences.times1,
         location1: occurrences.locations1,
         time2: occurrences.times2,
diff --git a/js/components/graph/Graph.js b/js/components/graph/Graph.js
index 33558c575..fc09c193a 100644
--- a/js/components/graph/Graph.js
+++ b/js/components/graph/Graph.js
@@ -1218,6 +1218,11 @@ export class Graph extends React.Component {
     })
   }
 
+  /**
+   * Checks if a node or bool node is currently selected or active.
+   * @param {string} nodeId 
+   * @returns {boolean}
+   */
   isSelected = nodeId => {
     if (this.state.nodesStatus[nodeId]) {
       return this.isSelectedNode(nodeId)
@@ -1248,7 +1253,8 @@ export class Graph extends React.Component {
 
   /**
    * Check if the prerequisite courses have been satisfied based on bool type.
-   * @returns {boolean} Whether any of the prereqs are satisfied.
+   * @param {string} boolId the ID of the bool node.
+   * @returns {boolean} Whether the bool is satisfied based on its prerequisite nodes.
    */
   arePrereqsSatisfiedBool = boolId => {
     const isAllTrue = element => {
@@ -1265,8 +1271,9 @@ export class Graph extends React.Component {
   }
 
   /**
-   * Checks whether all prerequisite/preceding nodes for the current one are satisfied
-   * @return {boolean}
+   * Recursively checks whether all prerequisite/preceding nodes for a node are satisfied.
+   * @param {string} nodeId the ID of the node.
+   * @return {boolean} whether all of the node's prerequisite nodes are satisfied by the selected courses.
    */
   arePrereqsSatisfiedNode = nodeId => {
     const parents = this.state.connections.parents[nodeId]
@@ -1291,8 +1298,9 @@ export class Graph extends React.Component {
   }
 
   /**
-   * Checks whether a hybrid node's prereq string is satisfied
-   * @return {boolean}
+   * Checks whether a hybrid node's prereq string is satisfied.
+   * @param {string} nodeId the ID of the hybrid node.
+   * @return {boolean} whether the node's text prerequisite string is satisfied by the selected courses.
    */
   arePrereqsSatisfiedHybrid = nodeId => {
     // Concatenate prereq string
@@ -1744,14 +1752,15 @@ export class Graph extends React.Component {
 
 export { ZOOM_INCREMENT, KEYBOARD_PANNING_INCREMENT }
 
-/** Helper function that adds parents of hybridNode to the parents object, and adds hybrid nodes as children of the Nodes they represent
- *
+/** 
+ * Helper function to populate the parents object and children object with the connections of a hybrid node.
+ * A parent-child connection is added for each course that appears in the hybrid node's prereq string.
  * @param {Node} hybridNode
  * @param {Array} nodesJSON
- * @param {Object} parents
+ * @param {Object} parentsObj
  * @param {Object} childrenObj
  */
-export function populateHybridRelatives(hybridNode, nodesJSON, parents, childrenObj) {
+export function populateHybridRelatives(hybridNode, nodesJSON, parentsObj, childrenObj) {
   // parse prereqs based on text
   let hybridText = hybridNode.text.map(textTag => textTag.text).join("")
   const nodeParents = []
@@ -1780,12 +1789,12 @@ export function populateHybridRelatives(hybridNode, nodesJSON, parents, children
       console.error("Could not find prereq for ", hybridText)
     }
   }
-  parents[hybridNode.id_] = nodeParents
+  parentsObj[hybridNode.id_] = nodeParents
 }
 
 /**
  * Helper for hybrid computation. Finds the node with the same course label as the hybrid.
- * @param  {string} course
+ * @param {string} course
  * @param {Array} nodesJSON
  * @return {Node}
  */
diff --git a/js/util/util.js b/js/util/util.js
index 4d3d01fc3..b6b6c0a9f 100644
--- a/js/util/util.js
+++ b/js/util/util.js
@@ -1,7 +1,8 @@
 /**
  * Parse a logical prerequisite string as a conjunction of disjunctions.
  * @param {string} s the prerequisite string
- * @returns a nested list of courses as an AND of ORs, or the course itself if no splitting is made
+ * @returns {string|Array} a nested list of courses as an AND of ORs, or the course itself if no
+ *  splitting is made
  */
 export function parseAnd(s) {
   // Base case: return the course if no splitting is to be made.
@@ -25,7 +26,8 @@ export function parseAnd(s) {
 /**
  * Parse a logical prerequisite string as a disjunction of conjunctions.
  * @param {string} s the prerequisite string
- * @returns a nested list of courses as an OR of ANDs, or the course itself if no splitting is made
+ * @returns {string|Array} a nested list of courses as an OR of ANDs, or the course itself if no
+ *  splitting is made
  */
 export function parseOr(s) {
   // Base case: return the course if no splitting is to be made.
@@ -51,7 +53,7 @@ export function parseOr(s) {
  * strip the result of top-level outer parentheses and spaces.
  * @param {string} s the prerequisite string
  * @param {string} separator the separator to split by (',' for and, '/' for or)
- * @returns the resulting list of conjunctives/disjunctives
+ * @returns {string[]} the resulting list of conjunctives/disjunctives
  */
 export function splitPrereqString(s, separator) {
   let splitList = []
@@ -84,7 +86,7 @@ export function splitPrereqString(s, separator) {
 /**
  * Helper function to strip a string entirely contained within a pair of parentheses.
  * @param {string} s the prerequisite string to strip parentheses from
- * @returns the same string with all fully-enclosing pairs of parentheses removed
+ * @returns {string} the same string with all fully-enclosing pairs of parentheses removed
  */
 export function removeOuterParens(s) {
   if (s.length < 2 || s.charAt(0) !== "(" || s.charAt(s.length - 1) !== ")") {