diff --git a/README.md b/README.md
index d530418..65865a0 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ One advantage of having such an interface is that one can easily use it for read
 
 ### Mobipocket and Kindle Files
 
-It can read both MOBI and KF8 (.azw3, and combo .mobi files) from a `File` (or `Blob`) object. For MOBI files, it decompresses all text at once and splits the raw markup into sections at every `<mbp:pagebreak>`, instead of outputing one long page for the whole book, which drastically improves rendering performance. For KF8 files, it tries to decompress as little text as possible when loading a section, but it can still be quite slow due to the slowness of the current HUFF/CDIC decompressor implementation. In all cases, images and other resources are not loaded until they are needed.
+It can read both MOBI and KF8 (.azw3, and combo .mobi files) from a `File` (or `Blob`) object. For MOBI files, it decompresses all text at once and splits the raw markup into sections at every `<mbp:pagebreak>`, instead of outputting one long page for the whole book, which drastically improves rendering performance. For KF8 files, it tries to decompress as little text as possible when loading a section, but it can still be quite slow due to the slowness of the current HUFF/CDIC decompressor implementation. In all cases, images and other resources are not loaded until they are needed.
 
 Note that KF8 files can contain fonts that are zlib-compressed. They need to be decompressed with an external library. The demo uses [fflate](https://github.com/101arrowz/fflate) to decompress them.
 
@@ -237,7 +237,7 @@ A range CFI is an object `{ parent, start, end }`, each property being the same
 
 The parser uses a state machine rather than regex, and should handle assertions that contain escaped characters correctly (see tests for examples of this).
 
-It has the ability ignore nodes, which is needed if you want to inject your own nodes into the document without affecting CFIs. To do this, you need to pass the optional filter function that works similarily to the filter function of [`TreeWalker`s](https://developer.mozilla.org/en-US/docs/Web/API/Document/createTreeWalker):
+It has the ability ignore nodes, which is needed if you want to inject your own nodes into the document without affecting CFIs. To do this, you need to pass the optional filter function that works similarly to the filter function of [`TreeWalker`s](https://developer.mozilla.org/en-US/docs/Web/API/Document/createTreeWalker):
 
 ```js
 const filter = node => node.nodeType !== 1 ? NodeFilter.FILTER_ACCEPT
@@ -356,7 +356,7 @@ document.querySelector('foliate-quoteimage').getBlob({
 
 The main use of the library is for use in [Foliate](https://github.com/johnfactotum/foliate), which uses WebKitGTK. As such it's the only engine that has been tested extensively. But it should also work in Chromium and Firefox.
 
-Apart from the renderers, using the modules outside browsers is also possible. Most features depend on having the global objects `Blob`, `TextDecoder`, `TextEncoder`, `DOMParser`, `XMLSerializer`, and `URL`, and should work if you polyfill them. Note that `epubcfi.js` can be used as is in any envirnoment if you only need to parse or sort CFIs.
+Apart from the renderers, using the modules outside browsers is also possible. Most features depend on having the global objects `Blob`, `TextDecoder`, `TextEncoder`, `DOMParser`, `XMLSerializer`, and `URL`, and should work if you polyfill them. Note that `epubcfi.js` can be used as is in any environment if you only need to parse or sort CFIs.
 
 ## License
 
diff --git a/epub.js b/epub.js
index 8a13b91..f63bc15 100644
--- a/epub.js
+++ b/epub.js
@@ -120,7 +120,7 @@ const pathRelative = (from, to) => {
 const pathDirname = str => str.slice(0, str.lastIndexOf('/') + 1)
 
 // replace asynchronously and sequentially
-// same techinque as https://stackoverflow.com/a/48032528
+// same technique as https://stackoverflow.com/a/48032528
 const replaceSeries = async (str, regex, f) => {
     const matches = []
     str.replace(regex, (...args) => (matches.push(args), null))
diff --git a/pdf.js b/pdf.js
index 8ea5c2d..b0940e5 100644
--- a/pdf.js
+++ b/pdf.js
@@ -148,7 +148,7 @@ const annotationLayerBuilderCSS = `
     --input-disabled-border-color: GrayText;
     --input-hover-border-color: Highlight;
     --link-outline: 1.5px solid LinkText;
-    --hcm-highligh-filter: invert(100%);
+    --hcm-highlight-filter: invert(100%);
   }
   .annotationLayer .textWidgetAnnotation :is(input, textarea):required,
   .annotationLayer .choiceWidgetAnnotation select:required,
@@ -159,7 +159,7 @@ const annotationLayerBuilderCSS = `
   }
 
   .annotationLayer .linkAnnotation:hover {
-    backdrop-filter: var(--hcm-highligh-filter);
+    backdrop-filter: var(--hcm-highlight-filter);
   }
 
   .annotationLayer .linkAnnotation > a:hover {
@@ -180,7 +180,7 @@ const annotationLayerBuilderCSS = `
     left: 0;
     width: 100%;
     height: 100%;
-    backdrop-filter: var(--hcm-highligh-filter);
+    backdrop-filter: var(--hcm-highlight-filter);
     content: "";
     pointer-events: none;
   }
diff --git a/search.js b/search.js
index 381aa2a..cc889b4 100644
--- a/search.js
+++ b/search.js
@@ -109,11 +109,11 @@ export const search = (strs, query, options) => {
 }
 
 export const searchMatcher = (textWalker, opts) => {
-    const { defalutLocale, matchCase, matchDiacritics, matchWholeWords } = opts
+    const { defaultLocale, matchCase, matchDiacritics, matchWholeWords } = opts
     return function* (doc, query) {
         const iter = textWalker(doc, function* (strs, makeRange) {
             for (const result of search(strs, query, {
-                locales: doc.body.lang || doc.documentElement.lang || defalutLocale || 'en',
+                locales: doc.body.lang || doc.documentElement.lang || defaultLocale || 'en',
                 granularity: matchWholeWords ? 'word' : 'grapheme',
                 sensitivity: matchDiacritics && matchCase ? 'variant'
                 : matchDiacritics && !matchCase ? 'accent'